Remove accents/diacritics in a string in JavaScript

Question

How do I remove accentuated characters from a string? Especially in IE6, I had something like this:

accentsTidy = function(s){
    var r=s.toLowerCase();
    r = r.replace(new RegExp(/\s/g),"");
    r = r.replace(new RegExp(/[àáâãäå]/g),"a");
    r = r.replace(new RegExp(/æ/g),"ae");
    r = r.replace(new RegExp(/ç/g),"c");
    r = r.replace(new RegExp(/[èéêë]/g),"e");
    r = r.replace(new RegExp(/[ìíîï]/g),"i");
    r = r.replace(new RegExp(/ñ/g),"n");                
    r = r.replace(new RegExp(/[òóôõö]/g),"o");
    r = r.replace(new RegExp(/œ/g),"oe");
    r = r.replace(new RegExp(/[ùúûü]/g),"u");
    r = r.replace(new RegExp(/[ýÿ]/g),"y");
    r = r.replace(new RegExp(/\W/g),"");
    return r;
};

but IE6 bugs me, seems it doesn't like my regular expression.

Answer 1

With ES2015/ES6 String.Prototype.Normalize(),

const str = "Crème Brulée"
str.normalize("NFD").replace(/[\u0300-\u036f]/g, "")
> "Creme Brulee"

Two things are happening here:

1. normalize()ing to NFD Unicode normal form decomposes combined graphemes into the combination of simple ones. The è of Crème ends up expressed as e + ̀.
2. Using a regex character class to match the U+0300 → U+036F range, it is now trivial to globally get rid of the diacritics, which the Unicode standard conveniently groups as the Combining Diacritical Marks Unicode block.

See comment for performance testing.

Alternatively, if you just want sorting

Intl.Collator has sufficient support ~85% right now, a polyfill is also available here but I haven't tested it.

const c = new Intl.Collator();
["creme brulee", "crème brulée", "crame brulai", "crome brouillé",
"creme brulay", "creme brulfé", "creme bruléa"].sort(c.compare)
["crame brulai", "creme brulay", "creme bruléa", "creme brulee",
"crème brulée", "creme brulfé", "crome brouillé"]


["creme brulee", "crème brulée", "crame brulai", "crome brouillé"].sort((a,b) => a>b)
["crame brulai", "creme brulee", "crome brouillé", "crème brulée"]

Answer 2

I slightly modified khel version for one reason: Every regexp parse/replace will cost O(n) operations, where n is number of characters in target text. But, regexp is not exactly what we need. So:

/*
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
    var defaultDiacriticsRemovalMap = [
        {'base':'A', 'letters':'\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F'},
        {'base':'AA','letters':'\uA732'},
        {'base':'AE','letters':'\u00C6\u01FC\u01E2'},
        {'base':'AO','letters':'\uA734'},
        {'base':'AU','letters':'\uA736'},
        {'base':'AV','letters':'\uA738\uA73A'},
        {'base':'AY','letters':'\uA73C'},
        {'base':'B', 'letters':'\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181'},
        {'base':'C', 'letters':'\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E'},
        {'base':'D', 'letters':'\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779\u00D0'},
        {'base':'DZ','letters':'\u01F1\u01C4'},
        {'base':'Dz','letters':'\u01F2\u01C5'},
        {'base':'E', 'letters':'\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E'},
        {'base':'F', 'letters':'\u0046\u24BB\uFF26\u1E1E\u0191\uA77B'},
        {'base':'G', 'letters':'\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E'},
        {'base':'H', 'letters':'\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D'},
        {'base':'I', 'letters':'\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197'},
        {'base':'J', 'letters':'\u004A\u24BF\uFF2A\u0134\u0248'},
        {'base':'K', 'letters':'\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2'},
        {'base':'L', 'letters':'\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780'},
        {'base':'LJ','letters':'\u01C7'},
        {'base':'Lj','letters':'\u01C8'},
        {'base':'M', 'letters':'\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C'},
        {'base':'N', 'letters':'\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4'},
        {'base':'NJ','letters':'\u01CA'},
        {'base':'Nj','letters':'\u01CB'},
        {'base':'O', 'letters':'\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C'},
        {'base':'OI','letters':'\u01A2'},
        {'base':'OO','letters':'\uA74E'},
        {'base':'OU','letters':'\u0222'},
        {'base':'OE','letters':'\u008C\u0152'},
        {'base':'oe','letters':'\u009C\u0153'},
        {'base':'P', 'letters':'\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754'},
        {'base':'Q', 'letters':'\u0051\u24C6\uFF31\uA756\uA758\u024A'},
        {'base':'R', 'letters':'\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782'},
        {'base':'S', 'letters':'\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784'},
        {'base':'T', 'letters':'\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786'},
        {'base':'TZ','letters':'\uA728'},
        {'base':'U', 'letters':'\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244'},
        {'base':'V', 'letters':'\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245'},
        {'base':'VY','letters':'\uA760'},
        {'base':'W', 'letters':'\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72'},
        {'base':'X', 'letters':'\u0058\u24CD\uFF38\u1E8A\u1E8C'},
        {'base':'Y', 'letters':'\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE'},
        {'base':'Z', 'letters':'\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762'},
        {'base':'a', 'letters':'\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250'},
        {'base':'aa','letters':'\uA733'},
        {'base':'ae','letters':'\u00E6\u01FD\u01E3'},
        {'base':'ao','letters':'\uA735'},
        {'base':'au','letters':'\uA737'},
        {'base':'av','letters':'\uA739\uA73B'},
        {'base':'ay','letters':'\uA73D'},
        {'base':'b', 'letters':'\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253'},
        {'base':'c', 'letters':'\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184'},
        {'base':'d', 'letters':'\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A'},
        {'base':'dz','letters':'\u01F3\u01C6'},
        {'base':'e', 'letters':'\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD'},
        {'base':'f', 'letters':'\u0066\u24D5\uFF46\u1E1F\u0192\uA77C'},
        {'base':'g', 'letters':'\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F'},
        {'base':'h', 'letters':'\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265'},
        {'base':'hv','letters':'\u0195'},
        {'base':'i', 'letters':'\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131'},
        {'base':'j', 'letters':'\u006A\u24D9\uFF4A\u0135\u01F0\u0249'},
        {'base':'k', 'letters':'\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3'},
        {'base':'l', 'letters':'\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747'},
        {'base':'lj','letters':'\u01C9'},
        {'base':'m', 'letters':'\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F'},
        {'base':'n', 'letters':'\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5'},
        {'base':'nj','letters':'\u01CC'},
        {'base':'o', 'letters':'\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275'},
        {'base':'oi','letters':'\u01A3'},
        {'base':'ou','letters':'\u0223'},
        {'base':'oo','letters':'\uA74F'},
        {'base':'p','letters':'\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755'},
        {'base':'q','letters':'\u0071\u24E0\uFF51\u024B\uA757\uA759'},
        {'base':'r','letters':'\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783'},
        {'base':'s','letters':'\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B'},
        {'base':'t','letters':'\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787'},
        {'base':'tz','letters':'\uA729'},
        {'base':'u','letters': '\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289'},
        {'base':'v','letters':'\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C'},
        {'base':'vy','letters':'\uA761'},
        {'base':'w','letters':'\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73'},
        {'base':'x','letters':'\u0078\u24E7\uFF58\u1E8B\u1E8D'},
        {'base':'y','letters':'\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF'},
        {'base':'z','letters':'\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763'}
    ];

    var diacriticsMap = {};
    for (var i=0; i < defaultDiacriticsRemovalMap .length; i++){
        var letters = defaultDiacriticsRemovalMap [i].letters;
        for (var j=0; j < letters.length ; j++){
            diacriticsMap[letters[j]] = defaultDiacriticsRemovalMap [i].base;
        }
    }

    // "what?" version ... http://jsperf.com/diacritics/12
    function removeDiacritics (str) {
        return str.replace(/[^\u0000-\u007E]/g, function(a){ 
           return diacriticsMap[a] || a; 
        });
    }    
    var paragraph = "L'avantage d'utiliser le lorem ipsum est bien     évidemment de pouvoir créer des maquettes ou de remplir un site internet de contenus qui présentent un rendu s'approchant un maximum du rendu final. \n Par défaut lorem ipsum ne contient pas d'accent ni de caractères spéciaux contrairement à la langue française qui en contient beaucoup. C'est sur ce critère que nous proposons une solution avec cet outil qui générant du faux-texte lorem ipsum mais avec en plus, des caractères spéciaux tel que les accents ou certains symboles utiles pour la langue française. \n L'utilisation du lorem standard est facile d’utilisation mais lorsque le futur client utilisera votre logiciel il se peut que certains caractères spéciaux ou qu'un accent ne soient pas codés correctement. \n Cette page a pour but donc de pouvoir perdre le moins de temps possible et donc de tester directement si tous les encodages de base de donnée ou des sites sont les bons de plus il permet de récuperer un code css avec le texte formaté !";
    alert(removeDiacritics(paragraph));

To test my theory I wrote a test in http://jsperf.com/diacritics/12. Results:

Testing in Chrome 28.0.1500.95 32-bit on Windows 8 64-bit:
Using Regexp
4,558 ops/sec ±4.16%. 37% slower
String Builder style
7,308 ops/sec ±4.88%. fastest

Update

Testing in Chrome 33.0.1750 on Windows 8 64-bit:

Using Regexp
5,260 ±1.25% ops/sec 76% slower
Using @skerit version
22,138 ±2.12% ops/sec fastest

Update - 19/03/2014

Adding missing "OE" diacritics.

Update - 27/03/2014

Using a faster way to transverse a string using js - "What?" Version

Update - 14/05/2014

Community wiki

Answer 3

A more complete version with case sensitive support, ligatures and whatnot. Original source at: http://lehelk.com/2011/05/06/script-to-remove-diacritics/

var defaultDiacriticsRemovalMap = [
    {'base':'A', 'letters':/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g},
    {'base':'AA','letters':/[\uA732]/g},
    {'base':'AE','letters':/[\u00C6\u01FC\u01E2]/g},
    {'base':'AO','letters':/[\uA734]/g},
    {'base':'AU','letters':/[\uA736]/g},
    {'base':'AV','letters':/[\uA738\uA73A]/g},
    {'base':'AY','letters':/[\uA73C]/g},
    {'base':'B', 'letters':/[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181]/g},
    {'base':'C', 'letters':/[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E]/g},
    {'base':'D', 'letters':/[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779]/g},
    {'base':'DZ','letters':/[\u01F1\u01C4]/g},
    {'base':'Dz','letters':/[\u01F2\u01C5]/g},
    {'base':'E', 'letters':/[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E]/g},
    {'base':'F', 'letters':/[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B]/g},
    {'base':'G', 'letters':/[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E]/g},
    {'base':'H', 'letters':/[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D]/g},
    {'base':'I', 'letters':/[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197]/g},
    {'base':'J', 'letters':/[\u004A\u24BF\uFF2A\u0134\u0248]/g},
    {'base':'K', 'letters':/[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2]/g},
    {'base':'L', 'letters':/[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780]/g},
    {'base':'LJ','letters':/[\u01C7]/g},
    {'base':'Lj','letters':/[\u01C8]/g},
    {'base':'M', 'letters':/[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C]/g},
    {'base':'N', 'letters':/[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4]/g},
    {'base':'NJ','letters':/[\u01CA]/g},
    {'base':'Nj','letters':/[\u01CB]/g},
    {'base':'O', 'letters':/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g},
    {'base':'OI','letters':/[\u01A2]/g},
    {'base':'OO','letters':/[\uA74E]/g},
    {'base':'OU','letters':/[\u0222]/g},
    {'base':'P', 'letters':/[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754]/g},
    {'base':'Q', 'letters':/[\u0051\u24C6\uFF31\uA756\uA758\u024A]/g},
    {'base':'R', 'letters':/[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782]/g},
    {'base':'S', 'letters':/[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784]/g},
    {'base':'T', 'letters':/[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786]/g},
    {'base':'TZ','letters':/[\uA728]/g},
    {'base':'U', 'letters':/[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244]/g},
    {'base':'V', 'letters':/[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245]/g},
    {'base':'VY','letters':/[\uA760]/g},
    {'base':'W', 'letters':/[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72]/g},
    {'base':'X', 'letters':/[\u0058\u24CD\uFF38\u1E8A\u1E8C]/g},
    {'base':'Y', 'letters':/[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE]/g},
    {'base':'Z', 'letters':/[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762]/g},
    {'base':'a', 'letters':/[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250]/g},
    {'base':'aa','letters':/[\uA733]/g},
    {'base':'ae','letters':/[\u00E6\u01FD\u01E3]/g},
    {'base':'ao','letters':/[\uA735]/g},
    {'base':'au','letters':/[\uA737]/g},
    {'base':'av','letters':/[\uA739\uA73B]/g},
    {'base':'ay','letters':/[\uA73D]/g},
    {'base':'b', 'letters':/[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253]/g},
    {'base':'c', 'letters':/[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184]/g},
    {'base':'d', 'letters':/[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A]/g},
    {'base':'dz','letters':/[\u01F3\u01C6]/g},
    {'base':'e', 'letters':/[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD]/g},
    {'base':'f', 'letters':/[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C]/g},
    {'base':'g', 'letters':/[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F]/g},
    {'base':'h', 'letters':/[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265]/g},
    {'base':'hv','letters':/[\u0195]/g},
    {'base':'i', 'letters':/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g},
    {'base':'j', 'letters':/[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g},
    {'base':'k', 'letters':/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g},
    {'base':'l', 'letters':/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g},
    {'base':'lj','letters':/[\u01C9]/g},
    {'base':'m', 'letters':/[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g},
    {'base':'n', 'letters':/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},
    {'base':'nj','letters':/[\u01CC]/g},
    {'base':'o', 'letters':/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},
    {'base':'oi','letters':/[\u01A3]/g},
    {'base':'ou','letters':/[\u0223]/g},
    {'base':'oo','letters':/[\uA74F]/g},
    {'base':'p','letters':/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g},
    {'base':'q','letters':/[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g},
    {'base':'r','letters':/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g},
    {'base':'s','letters':/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g},
    {'base':'t','letters':/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g},
    {'base':'tz','letters':/[\uA729]/g},
    {'base':'u','letters':/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g},
    {'base':'v','letters':/[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g},
    {'base':'vy','letters':/[\uA761]/g},
    {'base':'w','letters':/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g},
    {'base':'x','letters':/[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g},
    {'base':'y','letters':/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g},
    {'base':'z','letters':/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g}
];
var changes;
function removeDiacritics (str) {
    if(!changes) {
        changes = defaultDiacriticsRemovalMap;
    }
    for(var i=0; i<changes.length; i++) {
        str = str.replace(changes[i].letters, changes[i].base);
    }
    return str;
}

Answer 4

Here is a very fast script based on the Unicode standard, taken from here: http://semplicewebsites.com/removing-accents-javascript

var Latinise={};Latinise.latin_map={"Á":"A","Ă":"A","Ắ":"A","Ặ":"A","Ằ":"A","Ẳ":"A","Ẵ":"A","Ǎ":"A","Â":"A","Ấ":"A","Ậ":"A","Ầ":"A","Ẩ":"A","Ẫ":"A","Ä":"A","Ǟ":"A","Ȧ":"A","Ǡ":"A","Ạ":"A","Ȁ":"A","À":"A","Ả":"A","Ȃ":"A","Ā":"A","Ą":"A","Å":"A","Ǻ":"A","Ḁ":"A","Ⱥ":"A","Ã":"A","Ꜳ":"AA","Æ":"AE","Ǽ":"AE","Ǣ":"AE","Ꜵ":"AO","Ꜷ":"AU","Ꜹ":"AV","Ꜻ":"AV","Ꜽ":"AY","Ḃ":"B","Ḅ":"B","Ɓ":"B","Ḇ":"B","Ƀ":"B","Ƃ":"B","Ć":"C","Č":"C","Ç":"C","Ḉ":"C","Ĉ":"C","Ċ":"C","Ƈ":"C","Ȼ":"C","Ď":"D","Ḑ":"D","Ḓ":"D","Ḋ":"D","Ḍ":"D","Ɗ":"D","Ḏ":"D","Dz":"D","Dž":"D","Đ":"D","Ƌ":"D","DZ":"DZ","DŽ":"DZ","É":"E","Ĕ":"E","Ě":"E","Ȩ":"E","Ḝ":"E","Ê":"E","Ế":"E","Ệ":"E","Ề":"E","Ể":"E","Ễ":"E","Ḙ":"E","Ë":"E","Ė":"E","Ẹ":"E","Ȅ":"E","È":"E","Ẻ":"E","Ȇ":"E","Ē":"E","Ḗ":"E","Ḕ":"E","Ę":"E","Ɇ":"E","Ẽ":"E","Ḛ":"E","Ꝫ":"ET","Ḟ":"F","Ƒ":"F","Ǵ":"G","Ğ":"G","Ǧ":"G","Ģ":"G","Ĝ":"G","Ġ":"G","Ɠ":"G","Ḡ":"G","Ǥ":"G","Ḫ":"H","Ȟ":"H","Ḩ":"H","Ĥ":"H","Ⱨ":"H","Ḧ":"H","Ḣ":"H","Ḥ":"H","Ħ":"H","Í":"I","Ĭ":"I","Ǐ":"I","Î":"I","Ï":"I","Ḯ":"I","İ":"I","Ị":"I","Ȉ":"I","Ì":"I","Ỉ":"I","Ȋ":"I","Ī":"I","Į":"I","Ɨ":"I","Ĩ":"I","Ḭ":"I","Ꝺ":"D","Ꝼ":"F","Ᵹ":"G","Ꞃ":"R","Ꞅ":"S","Ꞇ":"T","Ꝭ":"IS","Ĵ":"J","Ɉ":"J","Ḱ":"K","Ǩ":"K","Ķ":"K","Ⱪ":"K","Ꝃ":"K","Ḳ":"K","Ƙ":"K","Ḵ":"K","Ꝁ":"K","Ꝅ":"K","Ĺ":"L","Ƚ":"L","Ľ":"L","Ļ":"L","Ḽ":"L","Ḷ":"L","Ḹ":"L","Ⱡ":"L","Ꝉ":"L","Ḻ":"L","Ŀ":"L","Ɫ":"L","Lj":"L","Ł":"L","LJ":"LJ","Ḿ":"M","Ṁ":"M","Ṃ":"M","Ɱ":"M","Ń":"N","Ň":"N","Ņ":"N","Ṋ":"N","Ṅ":"N","Ṇ":"N","Ǹ":"N","Ɲ":"N","Ṉ":"N","Ƞ":"N","Nj":"N","Ñ":"N","NJ":"NJ","Ó":"O","Ŏ":"O","Ǒ":"O","Ô":"O","Ố":"O","Ộ":"O","Ồ":"O","Ổ":"O","Ỗ":"O","Ö":"O","Ȫ":"O","Ȯ":"O","Ȱ":"O","Ọ":"O","Ő":"O","Ȍ":"O","Ò":"O","Ỏ":"O","Ơ":"O","Ớ":"O","Ợ":"O","Ờ":"O","Ở":"O","Ỡ":"O","Ȏ":"O","Ꝋ":"O","Ꝍ":"O","Ō":"O","Ṓ":"O","Ṑ":"O","Ɵ":"O","Ǫ":"O","Ǭ":"O","Ø":"O","Ǿ":"O","Õ":"O","Ṍ":"O","Ṏ":"O","Ȭ":"O","Ƣ":"OI","Ꝏ":"OO","Ɛ":"E","Ɔ":"O","Ȣ":"OU","Ṕ":"P","Ṗ":"P","Ꝓ":"P","Ƥ":"P","Ꝕ":"P","Ᵽ":"P","Ꝑ":"P","Ꝙ":"Q","Ꝗ":"Q","Ŕ":"R","Ř":"R","Ŗ":"R","Ṙ":"R","Ṛ":"R","Ṝ":"R","Ȑ":"R","Ȓ":"R","Ṟ":"R","Ɍ":"R","Ɽ":"R","Ꜿ":"C","Ǝ":"E","Ś":"S","Ṥ":"S","Š":"S","Ṧ":"S","Ş":"S","Ŝ":"S","Ș":"S","Ṡ":"S","Ṣ":"S","Ṩ":"S","Ť":"T","Ţ":"T","Ṱ":"T","Ț":"T","Ⱦ":"T","Ṫ":"T","Ṭ":"T","Ƭ":"T","Ṯ":"T","Ʈ":"T","Ŧ":"T","Ɐ":"A","Ꞁ":"L","Ɯ":"M","Ʌ":"V","Ꜩ":"TZ","Ú":"U","Ŭ":"U","Ǔ":"U","Û":"U","Ṷ":"U","Ü":"U","Ǘ":"U","Ǚ":"U","Ǜ":"U","Ǖ":"U","Ṳ":"U","Ụ":"U","Ű":"U","Ȕ":"U","Ù":"U","Ủ":"U","Ư":"U","Ứ":"U","Ự":"U","Ừ":"U","Ử":"U","Ữ":"U","Ȗ":"U","Ū":"U","Ṻ":"U","Ų":"U","Ů":"U","Ũ":"U","Ṹ":"U","Ṵ":"U","Ꝟ":"V","Ṿ":"V","Ʋ":"V","Ṽ":"V","Ꝡ":"VY","Ẃ":"W","Ŵ":"W","Ẅ":"W","Ẇ":"W","Ẉ":"W","Ẁ":"W","Ⱳ":"W","Ẍ":"X","Ẋ":"X","Ý":"Y","Ŷ":"Y","Ÿ":"Y","Ẏ":"Y","Ỵ":"Y","Ỳ":"Y","Ƴ":"Y","Ỷ":"Y","Ỿ":"Y","Ȳ":"Y","Ɏ":"Y","Ỹ":"Y","Ź":"Z","Ž":"Z","Ẑ":"Z","Ⱬ":"Z","Ż":"Z","Ẓ":"Z","Ȥ":"Z","Ẕ":"Z","Ƶ":"Z","IJ":"IJ","Œ":"OE","ᴀ":"A","ᴁ":"AE","ʙ":"B","ᴃ":"B","ᴄ":"C","ᴅ":"D","ᴇ":"E","ꜰ":"F","ɢ":"G","ʛ":"G","ʜ":"H","ɪ":"I","ʁ":"R","ᴊ":"J","ᴋ":"K","ʟ":"L","ᴌ":"L","ᴍ":"M","ɴ":"N","ᴏ":"O","ɶ":"OE","ᴐ":"O","ᴕ":"OU","ᴘ":"P","ʀ":"R","ᴎ":"N","ᴙ":"R","ꜱ":"S","ᴛ":"T","ⱻ":"E","ᴚ":"R","ᴜ":"U","ᴠ":"V","ᴡ":"W","ʏ":"Y","ᴢ":"Z","á":"a","ă":"a","ắ":"a","ặ":"a","ằ":"a","ẳ":"a","ẵ":"a","ǎ":"a","â":"a","ấ":"a","ậ":"a","ầ":"a","ẩ":"a","ẫ":"a","ä":"a","ǟ":"a","ȧ":"a","ǡ":"a","ạ":"a","ȁ":"a","à":"a","ả":"a","ȃ":"a","ā":"a","ą":"a","ᶏ":"a","ẚ":"a","å":"a","ǻ":"a","ḁ":"a","ⱥ":"a","ã":"a","ꜳ":"aa","æ":"ae","ǽ":"ae","ǣ":"ae","ꜵ":"ao","ꜷ":"au","ꜹ":"av","ꜻ":"av","ꜽ":"ay","ḃ":"b","ḅ":"b","ɓ":"b","ḇ":"b","ᵬ":"b","ᶀ":"b","ƀ":"b","ƃ":"b","ɵ":"o","ć":"c","č":"c","ç":"c","ḉ":"c","ĉ":"c","ɕ":"c","ċ":"c","ƈ":"c","ȼ":"c","ď":"d","ḑ":"d","ḓ":"d","ȡ":"d","ḋ":"d","ḍ":"d","ɗ":"d","ᶑ":"d","ḏ":"d","ᵭ":"d","ᶁ":"d","đ":"d","ɖ":"d","ƌ":"d","ı":"i","ȷ":"j","ɟ":"j","ʄ":"j","dz":"dz","dž":"dz","é":"e","ĕ":"e","ě":"e","ȩ":"e","ḝ":"e","ê":"e","ế":"e","ệ":"e","ề":"e","ể":"e","ễ":"e","ḙ":"e","ë":"e","ė":"e","ẹ":"e","ȅ":"e","è":"e","ẻ":"e","ȇ":"e","ē":"e","ḗ":"e","ḕ":"e","ⱸ":"e","ę":"e","ᶒ":"e","ɇ":"e","ẽ":"e","ḛ":"e","ꝫ":"et","ḟ":"f","ƒ":"f","ᵮ":"f","ᶂ":"f","ǵ":"g","ğ":"g","ǧ":"g","ģ":"g","ĝ":"g","ġ":"g","ɠ":"g","ḡ":"g","ᶃ":"g","ǥ":"g","ḫ":"h","ȟ":"h","ḩ":"h","ĥ":"h","ⱨ":"h","ḧ":"h","ḣ":"h","ḥ":"h","ɦ":"h","ẖ":"h","ħ":"h","ƕ":"hv","í":"i","ĭ":"i","ǐ":"i","î":"i","ï":"i","ḯ":"i","ị":"i","ȉ":"i","ì":"i","ỉ":"i","ȋ":"i","ī":"i","į":"i","ᶖ":"i","ɨ":"i","ĩ":"i","ḭ":"i","ꝺ":"d","ꝼ":"f","ᵹ":"g","ꞃ":"r","ꞅ":"s","ꞇ":"t","ꝭ":"is","ǰ":"j","ĵ":"j","ʝ":"j","ɉ":"j","ḱ":"k","ǩ":"k","ķ":"k","ⱪ":"k","ꝃ":"k","ḳ":"k","ƙ":"k","ḵ":"k","ᶄ":"k","ꝁ":"k","ꝅ":"k","ĺ":"l","ƚ":"l","ɬ":"l","ľ":"l","ļ":"l","ḽ":"l","ȴ":"l","ḷ":"l","ḹ":"l","ⱡ":"l","ꝉ":"l","ḻ":"l","ŀ":"l","ɫ":"l","ᶅ":"l","ɭ":"l","ł":"l","lj":"lj","ſ":"s","ẜ":"s","ẛ":"s","ẝ":"s","ḿ":"m","ṁ":"m","ṃ":"m","ɱ":"m","ᵯ":"m","ᶆ":"m","ń":"n","ň":"n","ņ":"n","ṋ":"n","ȵ":"n","ṅ":"n","ṇ":"n","ǹ":"n","ɲ":"n","ṉ":"n","ƞ":"n","ᵰ":"n","ᶇ":"n","ɳ":"n","ñ":"n","nj":"nj","ó":"o","ŏ":"o","ǒ":"o","ô":"o","ố":"o","ộ":"o","ồ":"o","ổ":"o","ỗ":"o","ö":"o","ȫ":"o","ȯ":"o","ȱ":"o","ọ":"o","ő":"o","ȍ":"o","ò":"o","ỏ":"o","ơ":"o","ớ":"o","ợ":"o","ờ":"o","ở":"o","ỡ":"o","ȏ":"o","ꝋ":"o","ꝍ":"o","ⱺ":"o","ō":"o","ṓ":"o","ṑ":"o","ǫ":"o","ǭ":"o","ø":"o","ǿ":"o","õ":"o","ṍ":"o","ṏ":"o","ȭ":"o","ƣ":"oi","ꝏ":"oo","ɛ":"e","ᶓ":"e","ɔ":"o","ᶗ":"o","ȣ":"ou","ṕ":"p","ṗ":"p","ꝓ":"p","ƥ":"p","ᵱ":"p","ᶈ":"p","ꝕ":"p","ᵽ":"p","ꝑ":"p","ꝙ":"q","ʠ":"q","ɋ":"q","ꝗ":"q","ŕ":"r","ř":"r","ŗ":"r","ṙ":"r","ṛ":"r","ṝ":"r","ȑ":"r","ɾ":"r","ᵳ":"r","ȓ":"r","ṟ":"r","ɼ":"r","ᵲ":"r","ᶉ":"r","ɍ":"r","ɽ":"r","ↄ":"c","ꜿ":"c","ɘ":"e","ɿ":"r","ś":"s","ṥ":"s","š":"s","ṧ":"s","ş":"s","ŝ":"s","ș":"s","ṡ":"s","ṣ":"s","ṩ":"s","ʂ":"s","ᵴ":"s","ᶊ":"s","ȿ":"s","ɡ":"g","ᴑ":"o","ᴓ":"o","ᴝ":"u","ť":"t","ţ":"t","ṱ":"t","ț":"t","ȶ":"t","ẗ":"t","ⱦ":"t","ṫ":"t","ṭ":"t","ƭ":"t","ṯ":"t","ᵵ":"t","ƫ":"t","ʈ":"t","ŧ":"t","ᵺ":"th","ɐ":"a","ᴂ":"ae","ǝ":"e","ᵷ":"g","ɥ":"h","ʮ":"h","ʯ":"h","ᴉ":"i","ʞ":"k","ꞁ":"l","ɯ":"m","ɰ":"m","ᴔ":"oe","ɹ":"r","ɻ":"r","ɺ":"r","ⱹ":"r","ʇ":"t","ʌ":"v","ʍ":"w","ʎ":"y","ꜩ":"tz","ú":"u","ŭ":"u","ǔ":"u","û":"u","ṷ":"u","ü":"u","ǘ":"u","ǚ":"u","ǜ":"u","ǖ":"u","ṳ":"u","ụ":"u","ű":"u","ȕ":"u","ù":"u","ủ":"u","ư":"u","ứ":"u","ự":"u","ừ":"u","ử":"u","ữ":"u","ȗ":"u","ū":"u","ṻ":"u","ų":"u","ᶙ":"u","ů":"u","ũ":"u","ṹ":"u","ṵ":"u","ᵫ":"ue","ꝸ":"um","ⱴ":"v","ꝟ":"v","ṿ":"v","ʋ":"v","ᶌ":"v","ⱱ":"v","ṽ":"v","ꝡ":"vy","ẃ":"w","ŵ":"w","ẅ":"w","ẇ":"w","ẉ":"w","ẁ":"w","ⱳ":"w","ẘ":"w","ẍ":"x","ẋ":"x","ᶍ":"x","ý":"y","ŷ":"y","ÿ":"y","ẏ":"y","ỵ":"y","ỳ":"y","ƴ":"y","ỷ":"y","ỿ":"y","ȳ":"y","ẙ":"y","ɏ":"y","ỹ":"y","ź":"z","ž":"z","ẑ":"z","ʑ":"z","ⱬ":"z","ż":"z","ẓ":"z","ȥ":"z","ẕ":"z","ᵶ":"z","ᶎ":"z","ʐ":"z","ƶ":"z","ɀ":"z","ff":"ff","ffi":"ffi","ffl":"ffl","fi":"fi","fl":"fl","ij":"ij","œ":"oe","st":"st","ₐ":"a","ₑ":"e","ᵢ":"i","ⱼ":"j","ₒ":"o","ᵣ":"r","ᵤ":"u","ᵥ":"v","ₓ":"x"};
String.prototype.latinise=function(){return this.replace(/[^A-Za-z0-9\[\] ]/g,function(a){return Latinise.latin_map[a]||a})};
String.prototype.latinize=String.prototype.latinise;
String.prototype.isLatin=function(){return this==this.latinise()}

Some examples:

> "Piqué".latinize();
"Pique"
> "Piqué".isLatin();
false
> "Pique".isLatin();
true
> "Piqué".latinise().isLatin();
true

To ensure the above latin_map doesn't get corrupted by copy/pasting or other transformations, use this base64 encoded string, replacing the first line of the above:

var base64map="{"Á":"A","Ă":"A","Ắ":"A","Ặ":"A","Ằ":"A","Ẳ":"A","Ẵ":"A","Ǎ":"A","Â":"A","Ấ":"A","Ậ":"A","Ầ":"A","Ẩ":"A","Ẫ":"A","Ä":"A","Ǟ":"A","Ȧ":"A","Ǡ":"A","Ạ":"A","Ȁ":"A","À":"A","Ả":"A","Ȃ":"A","Ā":"A","Ą":"A","Å":"A","Ǻ":"A","Ḁ":"A","Ⱥ":"A","Ã":"A","Ꜳ":"AA","Æ":"AE","Ǽ":"AE","Ǣ":"AE","Ꜵ":"AO","Ꜷ":"AU","Ꜹ":"AV","Ꜻ":"AV","Ꜽ":"AY","Ḃ":"B","Ḅ":"B","Ɓ":"B","Ḇ":"B","Ƀ":"B","Ƃ":"B","Ć":"C","Č":"C","Ç":"C","Ḉ":"C","Ĉ":"C","Ċ":"C","Ƈ":"C","Ȼ":"C","Ď":"D","Ḑ":"D","Ḓ":"D","Ḋ":"D","Ḍ":"D","Ɗ":"D","Ḏ":"D","ǲ":"D","ǅ":"D","Đ":"D","Ƌ":"D","Ǳ":"DZ","Ǆ":"DZ","É":"E","Ĕ":"E","Ě":"E","Ȩ":"E","Ḝ":"E","Ê":"E","Ế":"E","Ệ":"E","Ề":"E","Ể":"E","Ễ":"E","Ḙ":"E","Ë":"E","Ė":"E","Ẹ":"E","Ȅ":"E","È":"E","Ẻ":"E","Ȇ":"E","Ē":"E","Ḗ":"E","Ḕ":"E","Ę":"E","Ɇ":"E","Ẽ":"E","Ḛ":"E","Ꝫ":"ET","Ḟ":"F","Ƒ":"F","Ǵ":"G","Ğ":"G","Ǧ":"G","Ģ":"G","Ĝ":"G","Ġ":"G","Ɠ":"G","Ḡ":"G","Ǥ":"G","Ḫ":"H","Ȟ":"H","Ḩ":"H","Ĥ":"H","Ⱨ":"H","Ḧ":"H","Ḣ":"H","Ḥ":"H","Ħ":"H","Í":"I","Ĭ":"I","Ǐ":"I","Î":"I","Ï":"I","Ḯ":"I","İ":"I","Ị":"I","Ȉ":"I","Ì":"I","Ỉ":"I","Ȋ":"I","Ī":"I","Į":"I","Ɨ":"I","Ĩ":"I","Ḭ":"I","Ꝺ":"D","Ꝼ":"F","Ᵹ":"G","Ꞃ":"R","Ꞅ":"S","Ꞇ":"T","Ꝭ":"IS","Ĵ":"J","Ɉ":"J","Ḱ":"K","Ǩ":"K","Ķ":"K","Ⱪ":"K","Ꝃ":"K","Ḳ":"K","Ƙ":"K","Ḵ":"K","Ꝁ":"K","Ꝅ":"K","Ĺ":"L","Ƚ":"L","Ľ":"L","Ļ":"L","Ḽ":"L","Ḷ":"L","Ḹ":"L","Ⱡ":"L","Ꝉ":"L","Ḻ":"L","Ŀ":"L","Ɫ":"L","ǈ":"L","Ł":"L","Ǉ":"LJ","Ḿ":"M","Ṁ":"M","Ṃ":"M","Ɱ":"M","Ń":"N","Ň":"N","Ņ":"N","Ṋ":"N","Ṅ":"N","Ṇ":"N","Ǹ":"N","Ɲ":"N","Ṉ":"N","Ƞ":"N","ǋ":"N","Ñ":"N","Ǌ":"NJ","Ó":"O","Ŏ":"O","Ǒ":"O","Ô":"O","Ố":"O","Ộ":"O","Ồ":"O","Ổ":"O","Ỗ":"O","Ö":"O","Ȫ":"O","Ȯ":"O","Ȱ":"O","Ọ":"O","Ő":"O","Ȍ":"O","Ò":"O","Ỏ":"O","Ơ":"O","Ớ":"O","Ợ":"O","Ờ":"O","Ở":"O","Ỡ":"O","Ȏ":"O","Ꝋ":"O","Ꝍ":"O","Ō":"O","Ṓ":"O","Ṑ":"O","Ɵ":"O","Ǫ":"O","Ǭ":"O","Ø":"O","Ǿ":"O","Õ":"O","Ṍ":"O","Ṏ":"O","Ȭ":"O","Ƣ":"OI","Ꝏ":"OO","Ɛ":"E","Ɔ":"O","Ȣ":"OU","Ṕ":"P","Ṗ":"P","Ꝓ":"P","Ƥ":"P","Ꝕ":"P","Ᵽ":"P","Ꝑ":"P","Ꝙ":"Q","Ꝗ":"Q","Ŕ":"R","Ř":"R","Ŗ":"R","Ṙ":"R","Ṛ":"R","Ṝ":"R","Ȑ":"R","Ȓ":"R","Ṟ":"R","Ɍ":"R","Ɽ":"R","Ꜿ":"C","Ǝ":"E","Ś":"S","Ṥ":"S","Š":"S","Ṧ":"S","Ş":"S","Ŝ":"S","Ș":"S","Ṡ":"S","Ṣ":"S","Ṩ":"S","Ť":"T","Ţ":"T","Ṱ":"T","Ț":"T","Ⱦ":"T","Ṫ":"T","Ṭ":"T","Ƭ":"T","Ṯ":"T","Ʈ":"T","Ŧ":"T","Ɐ":"A","Ꞁ":"L","Ɯ":"M","Ʌ":"V","Ꜩ":"TZ","Ú":"U","Ŭ":"U","Ǔ":"U","Û":"U","Ṷ":"U","Ü":"U","Ǘ":"U","Ǚ":"U","Ǜ":"U","Ǖ":"U","Ṳ":"U","Ụ":"U","Ű":"U","Ȕ":"U","Ù":"U","Ủ":"U","Ư":"U","Ứ":"U","Ự":"U","Ừ":"U","Ử":"U","Ữ":"U","Ȗ":"U","Ū":"U","Ṻ":"U","Ų":"U","Ů":"U","Ũ":"U","Ṹ":"U","Ṵ":"U","Ꝟ":"V","Ṿ":"V","Ʋ":"V","Ṽ":"V","Ꝡ":"VY","Ẃ":"W","Ŵ":"W","Ẅ":"W","Ẇ":"W","Ẉ":"W","Ẁ":"W","Ⱳ":"W","Ẍ":"X","Ẋ":"X","Ý":"Y","Ŷ":"Y","Ÿ":"Y","Ẏ":"Y","Ỵ":"Y","Ỳ":"Y","Ƴ":"Y","Ỷ":"Y","Ỿ":"Y","Ȳ":"Y","Ɏ":"Y","Ỹ":"Y","Ź":"Z","Ž":"Z","Ẑ":"Z","Ⱬ":"Z","Ż":"Z","Ẓ":"Z","Ȥ":"Z","Ẕ":"Z","Ƶ":"Z","Ĳ":"IJ","Œ":"OE","ᴀ":"A","ᴁ":"AE","ʙ":"B","ᴃ":"B","ᴄ":"C","ᴅ":"D","ᴇ":"E","ꜰ":"F","ɢ":"G","ʛ":"G","ʜ":"H","ɪ":"I","ʁ":"R","ᴊ":"J","ᴋ":"K","ʟ":"L","ᴌ":"L","ᴍ":"M","ɴ":"N","ᴏ":"O","ɶ":"OE","ᴐ":"O","ᴕ":"OU","ᴘ":"P","ʀ":"R","ᴎ":"N","ᴙ":"R","ꜱ":"S","ᴛ":"T","ⱻ":"E","ᴚ":"R","ᴜ":"U","ᴠ":"V","ᴡ":"W","ʏ":"Y","ᴢ":"Z","á":"a","ă":"a","ắ":"a","ặ":"a","ằ":"a","ẳ":"a","ẵ":"a","ǎ":"a","â":"a","ấ":"a","ậ":"a","ầ":"a","ẩ":"a","ẫ":"a","ä":"a","ǟ":"a","ȧ":"a","ǡ":"a","ạ":"a","ȁ":"a","à":"a","ả":"a","ȃ":"a","ā":"a","ą":"a","ᶏ":"a","ẚ":"a","å":"a","ǻ":"a","ḁ":"a","ⱥ":"a","ã":"a","ꜳ":"aa","æ":"ae","ǽ":"ae","ǣ":"ae","ꜵ":"ao","ꜷ":"au","ꜹ":"av","ꜻ":"av","ꜽ":"ay","ḃ":"b","ḅ":"b","ɓ":"b","ḇ":"b","ᵬ":"b","ᶀ":"b","ƀ":"b","ƃ":"b","ɵ":"o","ć":"c","č":"c","ç":"c","ḉ":"c","ĉ":"c","ɕ":"c","ċ":"c","ƈ":"c","ȼ":"c","ď":"d","ḑ":"d","ḓ":"d","ȡ":"d","ḋ":"d","ḍ":"d","ɗ":"d","ᶑ":"d","ḏ":"d","ᵭ":"d","ᶁ":"d","đ":"d","ɖ":"d","ƌ":"d","ı":"i","ȷ":"j","ɟ":"j","ʄ":"j","ǳ":"dz","ǆ":"dz","é":"e","ĕ":"e","ě":"e","ȩ":"e","ḝ":"e","ê":"e","ế":"e","ệ":"e","ề":"e","ể":"e","ễ":"e","ḙ":"e","ë":"e","ė":"e","ẹ":"e","ȅ":"e","è":"e","ẻ":"e","ȇ":"e","ē":"e","ḗ":"e","ḕ":"e","ⱸ":"e","ę":"e","ᶒ":"e","ɇ":"e","ẽ":"e","ḛ":"e","ꝫ":"et","ḟ":"f","ƒ":"f","ᵮ":"f","ᶂ":"f","ǵ":"g","ğ":"g","ǧ":"g","ģ":"g","ĝ":"g","ġ":"g","ɠ":"g","ḡ":"g","ᶃ":"g","ǥ":"g","ḫ":"h","ȟ":"h","ḩ":"h","ĥ":"h","ⱨ":"h","ḧ":"h","ḣ":"h","ḥ":"h","ɦ":"h","ẖ":"h","ħ":"h","ƕ":"hv","í":"i","ĭ":"i","ǐ":"i","î":"i","ï":"i","ḯ":"i","ị":"i","ȉ":"i","ì":"i","ỉ":"i","ȋ":"i","ī":"i","į":"i","ᶖ":"i","ɨ":"i","ĩ":"i","ḭ":"i","ꝺ":"d","ꝼ":"f","ᵹ":"g","ꞃ":"r","ꞅ":"s","ꞇ":"t","ꝭ":"is","ǰ":"j","ĵ":"j","ʝ":"j","ɉ":"j","ḱ":"k","ǩ":"k","ķ":"k","ⱪ":"k","ꝃ":"k","ḳ":"k","ƙ":"k","ḵ":"k","ᶄ":"k","ꝁ":"k","ꝅ":"k","ĺ":"l","ƚ":"l","ɬ":"l","ľ":"l","ļ":"l","ḽ":"l","ȴ":"l","ḷ":"l","ḹ":"l","ⱡ":"l","ꝉ":"l","ḻ":"l","ŀ":"l","ɫ":"l","ᶅ":"l","ɭ":"l","ł":"l","ǉ":"lj","ſ":"s","ẜ":"s","ẛ":"s","ẝ":"s","ḿ":"m","ṁ":"m","ṃ":"m","ɱ":"m","ᵯ":"m","ᶆ":"m","ń":"n","ň":"n","ņ":"n","ṋ":"n","ȵ":"n","ṅ":"n","ṇ":"n","ǹ":"n","ɲ":"n","ṉ":"n","ƞ":"n","ᵰ":"n","ᶇ":"n","ɳ":"n","ñ":"n","ǌ":"nj","ó":"o","ŏ":"o","ǒ":"o","ô":"o","ố":"o","ộ":"o","ồ":"o","ổ":"o","ỗ":"o","ö":"o","ȫ":"o","ȯ":"o","ȱ":"o","ọ":"o","ő":"o","ȍ":"o","ò":"o","ỏ":"o","ơ":"o","ớ":"o","ợ":"o","ờ":"o","ở":"o","ỡ":"o","ȏ":"o","ꝋ":"o","ꝍ":"o","ⱺ":"o","ō":"o","ṓ":"o","ṑ":"o","ǫ":"o","ǭ":"o","ø":"o","ǿ":"o","õ":"o","ṍ":"o","ṏ":"o","ȭ":"o","ƣ":"oi","ꝏ":"oo","ɛ":"e","ᶓ":"e","ɔ":"o","ᶗ":"o","ȣ":"ou","ṕ":"p","ṗ":"p","ꝓ":"p","ƥ":"p","ᵱ":"p","ᶈ":"p","ꝕ":"p","ᵽ":"p","ꝑ":"p","ꝙ":"q","ʠ":"q","ɋ":"q","ꝗ":"q","ŕ":"r","ř":"r","ŗ":"r","ṙ":"r","ṛ":"r","ṝ":"r","ȑ":"r","ɾ":"r","ᵳ":"r","ȓ":"r","ṟ":"r","ɼ":"r","ᵲ":"r","ᶉ":"r","ɍ":"r","ɽ":"r","ↄ":"c","ꜿ":"c","ɘ":"e","ɿ":"r","ś":"s","ṥ":"s","š":"s","ṧ":"s","ş":"s","ŝ":"s","ș":"s","ṡ":"s","ṣ":"s","ṩ":"s","ʂ":"s","ᵴ":"s","ᶊ":"s","ȿ":"s","ɡ":"g","ᴑ":"o","ᴓ":"o","ᴝ":"u","ť":"t","ţ":"t","ṱ":"t","ț":"t","ȶ":"t","ẗ":"t","ⱦ":"t","ṫ":"t","ṭ":"t","ƭ":"t","ṯ":"t","ᵵ":"t","ƫ":"t","ʈ":"t","ŧ":"t","ᵺ":"th","ɐ":"a","ᴂ":"ae","ǝ":"e","ᵷ":"g","ɥ":"h","ʮ":"h","ʯ":"h","ᴉ":"i","ʞ":"k","ꞁ":"l","ɯ":"m","ɰ":"m","ᴔ":"oe","ɹ":"r","ɻ":"r","ɺ":"r","ⱹ":"r","ʇ":"t","ʌ":"v","ʍ":"w","ʎ":"y","ꜩ":"tz","ú":"u","ŭ":"u","ǔ":"u","û":"u","ṷ":"u","ü":"u","ǘ":"u","ǚ":"u","ǜ":"u","ǖ":"u","ṳ":"u","ụ":"u","ű":"u","ȕ":"u","ù":"u","ủ":"u","ư":"u","ứ":"u","ự":"u","ừ":"u","ử":"u","ữ":"u","ȗ":"u","ū":"u","ṻ":"u","ų":"u","ᶙ":"u","ů":"u","ũ":"u","ṹ":"u","ṵ":"u","ᵫ":"ue","ꝸ":"um","ⱴ":"v","ꝟ":"v","ṿ":"v","ʋ":"v","ᶌ":"v","ⱱ":"v","ṽ":"v","ꝡ":"vy","ẃ":"w","ŵ":"w","ẅ":"w","ẇ":"w","ẉ":"w","ẁ":"w","ⱳ":"w","ẘ":"w","ẍ":"x","ẋ":"x","ᶍ":"x","ý":"y","ŷ":"y","ÿ":"y","ẏ":"y","ỵ":"y","ỳ":"y","ƴ":"y","ỷ":"y","ỿ":"y","ȳ":"y","ẙ":"y","ɏ":"y","ỹ":"y","ź":"z","ž":"z","ẑ":"z","ʑ":"z","ⱬ":"z","ż":"z","ẓ":"z","ȥ":"z","ẕ":"z","ᵶ":"z","ᶎ":"z","ʐ":"z","ƶ":"z","ɀ":"z","ﬀ":"ff","ﬃ":"ffi","ﬄ":"ffl","ﬁ":"fi","ﬂ":"fl","ĳ":"ij","œ":"oe","ﬆ":"st","ₐ":"a","ₑ":"e","ᵢ":"i","ⱼ":"j","ₒ":"o","ᵣ":"r","ᵤ":"u","ᵥ":"v","ₓ":"x"}";
var Latinise={};Latinise.latin_map=JSON.parse(decodeURIComponent(escape(atob(base64map))));

Answer 5

The format for new RegExp is

RegExp(something, 'modifiers');

So you would want

accentsTidy = function(s){
                        var r=s.toLowerCase();
                        r = r.replace(new RegExp("\\s", 'g'),"");
                        r = r.replace(new RegExp("[àáâãäå]", 'g'),"a");
                        r = r.replace(new RegExp("æ", 'g'),"ae");
                        r = r.replace(new RegExp("ç", 'g'),"c");
                        r = r.replace(new RegExp("[èéêë]", 'g'),"e");
                        r = r.replace(new RegExp("[ìíîï]", 'g'),"i");
                        r = r.replace(new RegExp("ñ", 'g'),"n");                            
                        r = r.replace(new RegExp("[òóôõö]", 'g'),"o");
                        r = r.replace(new RegExp("œ", 'g'),"oe");
                        r = r.replace(new RegExp("[ùúûü]", 'g'),"u");
                        r = r.replace(new RegExp("[ýÿ]", 'g'),"y");
                        r = r.replace(new RegExp("\\W", 'g'),"");
                        return r;
                };

Answer 6

You can use the _.deburr method from the Lodash library.

It's available as a stand-alone NPM package lodash.deburr, or as part of the lodash package.

let myStringWithAccent = 'Mon café est plein de caféïne';
let myStringWithoutAccent = deburr(myStringWithAccent);

The result will be : "Mon cafe est plein de cafeine"

Answer 7

Shortened code based on the excellent solution by Ian Elliott:

accentsTidy = function(s){
    var r = s.toLowerCase();
    non_asciis = {'a': '[àáâãäå]', 'ae': 'æ', 'c': 'ç', 'e': '[èéêë]', 'i': '[ìíîï]', 'n': 'ñ', 'o': '[òóôõö]', 'oe': 'œ', 'u': '[ùúûűü]', 'y': '[ýÿ]'};
    for (i in non_asciis) { r = r.replace(new RegExp(non_asciis[i], 'g'), i); }
    return r;
};

Edit: Corrected non-working code

Answer 8

In NPM there is a package for this: latinize

It's a very good package to solve this issue.

Answer 9

One solution that seems to be way faster by the given test : http://jsperf.com/diacritics/9

function removeDiacritics(str) {
   return str.replace(/[^A-Za-z0-9\s]+/g, function(a){
      return diacriticsMap[a] || a; 
   });
}
removeDiacritics(teste);

Working example: http://jsbin.com/sovorute/1/edit

Reasoning: One reason this is much faster is because we only iterate through the special characters, picked by the negated regex pattern. The fastest of the tests (String Iteration without in) iterates 1001 on the given text, which means every character. This one iterates only 35 times and outputs the same result. Keep in mind that this will only replace what is indicated in the map.

Classic article on the subject: http://alistapart.com/article/accent-folding-for-auto-complete

Credit: http://semplicewebsites.com/removing-accents-javascript , also provides a nice character map.

Answer 10

A simpler way to replace the diacriticals.

function replaceDiacritics(str){

  var diacritics = [
    {char: 'A', base: /[\300-\306]/g},
    {char: 'a', base: /[\340-\346]/g},
    {char: 'E', base: /[\310-\313]/g},
    {char: 'e', base: /[\350-\353]/g},
    {char: 'I', base: /[\314-\317]/g},
    {char: 'i', base: /[\354-\357]/g},
    {char: 'O', base: /[\322-\330]/g},
    {char: 'o', base: /[\362-\370]/g},
    {char: 'U', base: /[\331-\334]/g},
    {char: 'u', base: /[\371-\374]/g},
    {char: 'N', base: /[\321]/g},
    {char: 'n', base: /[\361]/g},
    {char: 'C', base: /[\307]/g},
    {char: 'c', base: /[\347]/g}
  ]

  diacritics.forEach(function(letter){
    str = str.replace(letter.base, letter.char);
  });

  return str;
};

Answer 11

There's a lot out there, but I think this one is simple and good enough:

 function remove_accents(strAccents) {
    var strAccents = strAccents.split('');
    var strAccentsOut = new Array();
    var strAccentsLen = strAccents.length;
    var accents =    "ÀÁÂÃÄÅàáâãäåÒÓÔÕÕÖØòóôõöøÈÉÊËèéêëðÇçÐÌÍÎÏìíîïÙÚÛÜùúûüÑñŠšŸÿýŽž";
    var accentsOut = "AAAAAAaaaaaaOOOOOOOooooooEEEEeeeeeCcDIIIIiiiiUUUUuuuuNnSsYyyZz";
    for (var y = 0; y < strAccentsLen; y++) {
        if (accents.indexOf(strAccents[y]) != -1) {
            strAccentsOut[y] = accentsOut.substr(accents.indexOf(strAccents[y]), 1);
        } else
            strAccentsOut[y] = strAccents[y];
    }
    strAccentsOut = strAccentsOut.join('');

    return strAccentsOut;
}

If you also want to remove special characters and transform spaces and hyphens in underscores, do this:

string = remove_accents(string);
string = string.replace(/[^a-z0-9\s]/gi, '').replace(/[-\s]/g, '_');

Answer 12

I have forked billy's code http://jsfiddle.net/billybraga/UHmnf/ (from his post) into this: http://jsfiddle.net/infralabs/dJX58/

I corrected transcription of ſ and ß characters and also added coversion of these ones: Þþ, Ðð, Ŋŋ, IJij, Œœ.

The modified snippet is below:

var defaultDiacriticsRemovalMap = [{
    'base': "A",
        'letters': /(A|Ⓐ|Ａ|À|Á|Â|Ầ|Ấ|Ẫ|Ẩ|Ã|Ā|Ă|Ằ|Ắ|Ẵ|Ẳ|Ȧ|Ǡ|Ä|Ǟ|Ả|Å|Ǻ|Ǎ|Ȁ|Ȃ|Ạ|Ậ|Ặ|Ḁ|Ą|Ⱥ|Ɐ|[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F])/g
}, {
    'base': "AA",
        'letters': /(Ꜳ|[\uA732])/g
}, {
    'base': "AE",
        'letters': /(Æ|Ǽ|Ǣ|[\u00C6\u01FC\u01E2])/g
}, {
    'base': "AO",
        'letters': /(Ꜵ|[\uA734])/g
}, {
    'base': "AU",
        'letters': /(Ꜷ|[\uA736])/g
}, {
    'base': "AV",
        'letters': /(Ꜹ|Ꜻ|[\uA738\uA73A])/g
}, {
    'base': "AY",
        'letters': /(Ꜽ|[\uA73C])/g
}, {
    'base': "B",
        'letters': /(B|Ⓑ|Ｂ|Ḃ|Ḅ|Ḇ|Ƀ|Ƃ|Ɓ|[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181])/g
}, {
    'base': "C",
        'letters': /(C|Ⓒ|Ｃ|Ć|Ĉ|Ċ|Č|Ç|Ḉ|Ƈ|Ȼ|Ꜿ|[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E])/g
}, {
    'base': "D",
        'letters': /(D|Ⓓ|Ｄ|Ḋ|Ď|Ḍ|Ḑ|Ḓ|Ḏ|Đ|Ƌ|Ɗ|Ɖ|Ꝺ|Ð|[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779\u00D0])/g
}, {
    'base': "DZ",
        'letters': /(DZ|DŽ|[\u01F1\u01C4])/g
}, {
    'base': "Dz",
        'letters': /(Dz|Dž|[\u01F2\u01C5])/g
}, {
    'base': "E",
        'letters': /(E|Ⓔ|Ｅ|È|É|Ê|Ề|Ế|Ễ|Ể|Ẽ|Ē|Ḕ|Ḗ|Ĕ|Ė|Ë|Ẻ|Ě|Ȅ|Ȇ|Ẹ|Ệ|Ȩ|Ḝ|Ę|Ḙ|Ḛ|Ɛ|Ǝ|[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E])/g
}, {
    'base': "F",
        'letters': /(F|Ⓕ|Ｆ|Ḟ|Ƒ|Ꝼ|[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B])/g
}, {
    'base': "G",
        'letters': /(G|Ⓖ|Ｇ|Ǵ|Ĝ|Ḡ|Ğ|Ġ|Ǧ|Ģ|Ǥ|Ɠ|Ꞡ|Ᵹ|Ꝿ|[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E])/g
}, {
    'base': "H",
        'letters': /(H|Ⓗ|Ｈ|Ĥ|Ḣ|Ḧ|Ȟ|Ḥ|Ḩ|Ḫ|Ħ|Ⱨ|Ⱶ|Ɥ|[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D])/g
}, {
    'base': "I",
        'letters': /(I|Ⓘ|Ｉ|Ì|Í|Î|Ĩ|Ī|Ĭ|İ|Ï|Ḯ|Ỉ|Ǐ|Ȉ|Ȋ|Ị|Į|Ḭ|Ɨ|[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197])/g
}, {
    'base': "J",
        'letters': /(J|Ⓙ|Ｊ|Ĵ|Ɉ|[\u004A\u24BF\uFF2A\u0134\u0248])/g
}, {
    'base': "K",
        'letters': /(K|Ⓚ|Ｋ|Ḱ|Ǩ|Ḳ|Ķ|Ḵ|Ƙ|Ⱪ|Ꝁ|Ꝃ|Ꝅ|Ꞣ|[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2])/g
}, {
    'base': "L",
        'letters': /(L|Ⓛ|Ｌ|Ŀ|Ĺ|Ľ|Ḷ|Ḹ|Ļ|Ḽ|Ḻ|Ł|Ƚ|Ɫ|Ⱡ|Ꝉ|Ꝇ|Ꞁ|[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780])/g
}, {
    'base': "LJ",
        'letters': /(LJ|[\u01C7])/g
}, {
    'base': "Lj",
        'letters': /(Lj|[\u01C8])/g
}, {
    'base': "M",
        'letters': /(M|Ⓜ|Ｍ|Ḿ|Ṁ|Ṃ|Ɱ|Ɯ|[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C])/g
}, {
    'base': "N",
        'letters': /(N|Ⓝ|Ｎ|Ǹ|Ń|Ñ|Ṅ|Ň|Ṇ|Ņ|Ṋ|Ṉ|Ƞ|Ɲ|Ꞑ|Ꞥ|Ŋ|[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4\u014A])/g
}, {
    'base': "NJ",
        'letters': /(NJ|[\u01CA])/g
}, {
    'base': "Nj",
        'letters': /(Nj|[\u01CB])/g
}, {
    'base': "O",
        'letters': /(O|Ⓞ|Ｏ|Ò|Ó|Ô|Ồ|Ố|Ỗ|Ổ|Õ|Ṍ|Ȭ|Ṏ|Ō|Ṑ|Ṓ|Ŏ|Ȯ|Ȱ|Ö|Ȫ|Ỏ|Ő|Ǒ|Ȍ|Ȏ|Ơ|Ờ|Ớ|Ỡ|Ở|Ợ|Ọ|Ộ|Ǫ|Ǭ|Ø|Ǿ|Ɔ|Ɵ|Ꝋ|Ꝍ|[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C])/g
}, {
    'base': "OE",
        'letters': /(Œ|[\u0152])/g
}, {
    'base': "OI",
        'letters': /(Ƣ|[\u01A2])/g
}, {
    'base': "OO",
        'letters': /(Ꝏ|[\uA74E])/g
}, {
    'base': "OU",
        'letters': /(Ȣ|[\u0222])/g
}, {
    'base': "P",
        'letters': /(P|Ⓟ|Ｐ|Ṕ|Ṗ|Ƥ|Ᵽ|Ꝑ|Ꝓ|Ꝕ|[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754])/g
}, {
    'base': "Q",
        'letters': /(Q|Ⓠ|Ｑ|Ꝗ|Ꝙ|Ɋ|[\u0051\u24C6\uFF31\uA756\uA758\u024A])/g
}, {
    'base': "R",
        'letters': /(R|Ⓡ|Ｒ|Ŕ|Ṙ|Ř|Ȑ|Ȓ|Ṛ|Ṝ|Ŗ|Ṟ|Ɍ|Ɽ|Ꝛ|Ꞧ|Ꞃ|[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782])/g
}, {
    'base': "S",
        'letters': /(S|Ⓢ|Ｓ|ẞ|Ś|Ṥ|Ŝ|Ṡ|Š|Ṧ|Ṣ|Ṩ|Ș|Ş|Ȿ|Ꞩ|Ꞅ|[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784])/g
}, {
    'base': "T",
        'letters': /(T|Ⓣ|Ｔ|Ṫ|Ť|Ṭ|Ț|Ţ|Ṱ|Ṯ|Ŧ|Ƭ|Ʈ|Ⱦ|Ꞇ|[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786])/g
}, {
    'base': "TH",
        'letters': /(Þ|[\u00DE])/g
}, {
    'base': "TZ",
        'letters': /(Ꜩ|[\uA728])/g
}, {
    'base': "U",
        'letters': /(U|Ⓤ|Ｕ|Ù|Ú|Û|Ũ|Ṹ|Ū|Ṻ|Ŭ|Ü|Ǜ|Ǘ|Ǖ|Ǚ|Ủ|Ů|Ű|Ǔ|Ȕ|Ȗ|Ư|Ừ|Ứ|Ữ|Ử|Ự|Ụ|Ṳ|Ų|Ṷ|Ṵ|Ʉ|[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244])/g
}, {
    'base': "V",
        'letters': /(V|Ⓥ|Ｖ|Ṽ|Ṿ|Ʋ|Ꝟ|Ʌ|[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245])/g
}, {
    'base': "VY",
        'letters': /(Ꝡ|[\uA760])/g
}, {
    'base': "W",
        'letters': /(W|Ⓦ|Ｗ|Ẁ|Ẃ|Ŵ|Ẇ|Ẅ|Ẉ|Ⱳ|[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72])/g
}, {
    'base': "X",
        'letters': /(X|Ⓧ|Ｘ|Ẋ|Ẍ|[\u0058\u24CD\uFF38\u1E8A\u1E8C])/g
}, {
    'base': "Y",
        'letters': /(Y|Ⓨ|Ｙ|Ỳ|Ý|Ŷ|Ỹ|Ȳ|Ẏ|Ÿ|Ỷ|Ỵ|Ƴ|Ɏ|Ỿ|[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE])/g
}, {
    'base': "Z",
        'letters': /(Z|Ⓩ|Ｚ|Ź|Ẑ|Ż|Ž|Ẓ|Ẕ|Ƶ|Ȥ|Ɀ|Ⱬ|Ꝣ|[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762])/g
}, {
    'base': "a",
        'letters': /(a|ⓐ|ａ|ẚ|à|á|â|ầ|ấ|ẫ|ẩ|ã|ā|ă|ằ|ắ|ẵ|ẳ|ȧ|ǡ|ä|ǟ|ả|å|ǻ|ǎ|ȁ|ȃ|ạ|ậ|ặ|ḁ|ą|ⱥ|ɐ|[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250])/g
}, {
    'base': "aa",
        'letters': /(ꜳ|[\uA733])/g
}, {
    'base': "ae",
        'letters': /(æ|ǽ|ǣ|[\u00E6\u01FD\u01E3])/g
}, {
    'base': "ao",
        'letters': /(ꜵ|[\uA735])/g
}, {
    'base': "au",
        'letters': /(ꜷ|[\uA737])/g
}, {
    'base': "av",
        'letters': /(ꜹ|ꜻ|[\uA739\uA73B])/g
}, {
    'base': "ay",
        'letters': /(ꜽ|[\uA73D])/g
}, {
    'base': "b",
        'letters': /(b|ⓑ|ｂ|ḃ|ḅ|ḇ|ƀ|ƃ|ɓ|[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253])/g
}, {
    'base': "c",
        'letters': /(c|ⓒ|ｃ|ć|ĉ|ċ|č|ç|ḉ|ƈ|ȼ|ꜿ|ↄ|[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184])/g
}, {
    'base': "d",
        'letters': /(d|ⓓ|ｄ|ḋ|ď|ḍ|ḑ|ḓ|ḏ|đ|ƌ|ɖ|ɗ|ꝺ|ð|[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A\u00F0])/g
}, {
    'base': "dz",
        'letters': /(dz|dž|[\u01F3\u01C6])/g
}, {
    'base': "e",
        'letters': /(e|ⓔ|ｅ|è|é|ê|ề|ế|ễ|ể|ẽ|ē|ḕ|ḗ|ĕ|ė|ë|ẻ|ě|ȅ|ȇ|ẹ|ệ|ȩ|ḝ|ę|ḙ|ḛ|ɇ|ɛ|ǝ|[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD])/g
}, {
    'base': "f",
        'letters': /(f|ⓕ|ｆ|ḟ|ƒ|ꝼ|[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C])/g
}, {
    'base': "g",
        'letters': /(g|ⓖ|ｇ|ǵ|ĝ|ḡ|ğ|ġ|ǧ|ģ|ǥ|ɠ|ꞡ|ᵹ|ꝿ|[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F])/g
}, {
    'base': "h",
        'letters': /(h|ⓗ|ｈ|ĥ|ḣ|ḧ|ȟ|ḥ|ḩ|ḫ|ẖ|ħ|ⱨ|ⱶ|ɥ|[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265])/g
}, {
    'base': "hv",
        'letters': /(ƕ|[\u0195])/g
}, {
    'base': "i",
        'letters': /(i|ⓘ|ｉ|ì|í|î|ĩ|ī|ĭ|ï|ḯ|ỉ|ǐ|ȉ|ȋ|ị|į|ḭ|ɨ|ı|[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131])/g
}, {
    'base': "ij",
        'letters': /(ij|[\u0133])/g
}, {
    'base': "j",
        'letters': /(j|ⓙ|ｊ|ĵ|ǰ|ɉ|[\u006A\u24D9\uFF4A\u0135\u01F0\u0249])/g
}, {
    'base': "k",
        'letters': /(k|ⓚ|ｋ|ḱ|ǩ|ḳ|ķ|ḵ|ƙ|ⱪ|ꝁ|ꝃ|ꝅ|ꞣ|[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3])/g
}, {
    'base': "l",
        'letters': /(l|ⓛ|ｌ|ŀ|ĺ|ľ|ḷ|ḹ|ļ|ḽ|ḻ|ł|ƚ|ɫ|ⱡ|ꝉ|ꞁ|ꝇ|[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u0142\u019A\u026B\u2C61\uA749\uA781\uA747])/g
}, {
    'base': "lj",
        'letters': /(lj|[\u01C9])/g
}, {
    'base': "m",
        'letters': /(m|ⓜ|ｍ|ḿ|ṁ|ṃ|ɱ|ɯ|[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F])/g
}, {
    'base': "n",
        'letters': /(n|ⓝ|ｎ|ǹ|ń|ñ|ṅ|ň|ṇ|ņ|ṋ|ṉ|ƞ|ɲ|ʼn|ꞑ|ꞥ|ŋ|[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u014B])/g
}, {
    'base': "nj",
        'letters': /(nj|[\u01CC])/g
}, {
    'base': "o",
        'letters': /(o|ⓞ|ｏ|ò|ó|ô|ồ|ố|ỗ|ổ|õ|ṍ|ȭ|ṏ|ō|ṑ|ṓ|ŏ|ȯ|ȱ|ö|ȫ|ỏ|ő|ǒ|ȍ|ȏ|ơ|ờ|ớ|ỡ|ở|ợ|ọ|ộ|ǫ|ǭ|ø|ǿ|ɔ|ꝋ|ꝍ|ɵ|[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275])/g
}, {
    'base': "oe",
        'letters': /(œ|[\u0153])/g
}, {
    'base': "oi",
        'letters': /(ƣ|[\u01A3])/g
}, {
    'base': "ou",
        'letters': /(ȣ|[\u0223])/g
}, {
    'base': "oo",
        'letters': /(ꝏ|[\uA74F])/g
}, {
    'base': "p",
        'letters': /(p|ⓟ|ｐ|ṕ|ṗ|ƥ|ᵽ|ꝑ|ꝓ|ꝕ|[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755])/g
}, {
    'base': "q",
        'letters': /(q|ⓠ|ｑ|ɋ|ꝗ|ꝙ|[\u0071\u24E0\uFF51\u024B\uA757\uA759])/g
}, {
    'base': "r",
        'letters': /(r|ⓡ|ｒ|ŕ|ṙ|ř|ȑ|ȓ|ṛ|ṝ|ŗ|ṟ|ɍ|ɽ|ꝛ|ꞧ|ꞃ|[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783])/g
}, {
    'base': "s",
        'letters': /(s|ⓢ|ｓ|ś|ṥ|ŝ|ṡ|š|ṧ|ṣ|ṩ|ș|ş|ȿ|ꞩ|ꞅ|ẛ|ſ|[\u0073\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u017F])/g
}, {
    'base': "ss",
        'letters': /(ß|[\u00DF])/g
}, {
    'base': "t",
        'letters': /(t|ⓣ|ｔ|ṫ|ẗ|ť|ṭ|ț|ţ|ṱ|ṯ|ŧ|ƭ|ʈ|ⱦ|ꞇ|[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787])/g
}, {
    'base': "th",
        'letters': /(þ|[\u00FE])/g
}, {
    'base': "tz",
        'letters': /(ꜩ|[\uA729])/g
}, {
    'base': "u",
        'letters': /(u|ⓤ|ｕ|ù|ú|û|ũ|ṹ|ū|ṻ|ŭ|ü|ǜ|ǘ|ǖ|ǚ|ủ|ů|ű|ǔ|ȕ|ȗ|ư|ừ|ứ|ữ|ử|ự|ụ|ṳ|ų|ṷ|ṵ|ʉ|[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289])/g
}, {
    'base': "v",
        'letters': /(v|ⓥ|ｖ|ṽ|ṿ|ʋ|ꝟ|ʌ|[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C])/g
}, {
    'base': "vy",
        'letters': /(ꝡ|[\uA761])/g
}, {
    'base': "w",
        'letters': /(w|ⓦ|ｗ|ẁ|ẃ|ŵ|ẇ|ẅ|ẘ|ẉ|ⱳ|[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73])/g
}, {
    'base': "x",
        'letters': /(x|ⓧ|ｘ|ẋ|ẍ|[\u0078\u24E7\uFF58\u1E8B\u1E8D])/g
}, {
    'base': "y",
        'letters': /(y|ⓨ|ｙ|ỳ|ý|ŷ|ỹ|ȳ|ẏ|ÿ|ỷ|ẙ|ỵ|ƴ|ɏ|ỿ|[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF])/g
}, {
    'base': "z",
        'letters': /(z|ⓩ|ｚ|ź|ẑ|ż|ž|ẓ|ẕ|ƶ|ȥ|ɀ|ⱬ|ꝣ|[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763])/g
}];

Answer 13

Here's my modified version of lehelk.com's version that also removes html entites that are accents :

http://jsfiddle.net/billybraga/UHmnf/

I still don't know about performance, though...

var defaultDiacriticsRemovalMap = [{
    'base': "A",
    'letters': /(A|Ⓐ|Ａ|À|Á|Â|Ầ|Ấ|Ẫ|Ẩ|Ã|Ā|Ă|Ằ|Ắ|Ẵ|Ẳ|Ȧ|Ǡ|Ä|Ǟ|Ả|Å|Ǻ|Ǎ|Ȁ|Ȃ|Ạ|Ậ|Ặ|Ḁ|Ą|Ⱥ|Ɐ|[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F])/g},
{
    'base': "AA",
    'letters': /(Ꜳ|[\uA732])/g},
{
    'base': "AE",
    'letters': /(Æ|Ǽ|Ǣ|[\u00C6\u01FC\u01E2])/g},
{
    'base': "AO",
    'letters': /(Ꜵ|[\uA734])/g},
{
    'base': "AU",
    'letters': /(Ꜷ|[\uA736])/g},
{
    'base': "AV",
    'letters': /(Ꜹ|Ꜻ|[\uA738\uA73A])/g},
{
    'base': "AY",
    'letters': /(Ꜽ|[\uA73C])/g},
{
    'base': "B",
    'letters': /(B|Ⓑ|Ｂ|Ḃ|Ḅ|Ḇ|Ƀ|Ƃ|Ɓ|[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181])/g},
{
    'base': "C",
    'letters': /(C|Ⓒ|Ｃ|Ć|Ĉ|Ċ|Č|Ç|Ḉ|Ƈ|Ȼ|Ꜿ|[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E])/g},
{
    'base': "D",
    'letters': /(D|Ⓓ|Ｄ|Ḋ|Ď|Ḍ|Ḑ|Ḓ|Ḏ|Đ|Ƌ|Ɗ|Ɖ|Ꝺ|[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779])/g},
{
    'base': "DZ",
    'letters': /(DZ|DŽ|[\u01F1\u01C4])/g},
{
    'base': "Dz",
    'letters': /(Dz|Dž|[\u01F2\u01C5])/g},
{
    'base': "E",
    'letters': /(E|Ⓔ|Ｅ|È|É|Ê|Ề|Ế|Ễ|Ể|Ẽ|Ē|Ḕ|Ḗ|Ĕ|Ė|Ë|Ẻ|Ě|Ȅ|Ȇ|Ẹ|Ệ|Ȩ|Ḝ|Ę|Ḙ|Ḛ|Ɛ|Ǝ|[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E])/g},
{
    'base': "F",
    'letters': /(F|Ⓕ|Ｆ|Ḟ|Ƒ|Ꝼ|[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B])/g},
{
    'base': "G",
    'letters': /(G|Ⓖ|Ｇ|Ǵ|Ĝ|Ḡ|Ğ|Ġ|Ǧ|Ģ|Ǥ|Ɠ|Ꞡ|Ᵹ|Ꝿ|[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E])/g},
{
    'base': "H",
    'letters': /(H|Ⓗ|Ｈ|Ĥ|Ḣ|Ḧ|Ȟ|Ḥ|Ḩ|Ḫ|Ħ|Ⱨ|Ⱶ|Ɥ|[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D])/g},
{
    'base': "I",
    'letters': /(I|Ⓘ|Ｉ|Ì|Í|Î|Ĩ|Ī|Ĭ|İ|Ï|Ḯ|Ỉ|Ǐ|Ȉ|Ȋ|Ị|Į|Ḭ|Ɨ|[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197])/g},
{
    'base': "J",
    'letters': /(J|Ⓙ|Ｊ|Ĵ|Ɉ|[\u004A\u24BF\uFF2A\u0134\u0248])/g},
{
    'base': "K",
    'letters': /(K|Ⓚ|Ｋ|Ḱ|Ǩ|Ḳ|Ķ|Ḵ|Ƙ|Ⱪ|Ꝁ|Ꝃ|Ꝅ|Ꞣ|[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2])/g},
{
    'base': "L",
    'letters': /(L|Ⓛ|Ｌ|Ŀ|Ĺ|Ľ|Ḷ|Ḹ|Ļ|Ḽ|Ḻ|Ł|Ƚ|Ɫ|Ⱡ|Ꝉ|Ꝇ|Ꞁ|[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780])/g},
{
    'base': "LJ",
    'letters': /(LJ|[\u01C7])/g},
{
    'base': "Lj",
    'letters': /(Lj|[\u01C8])/g},
{
    'base': "M",
    'letters': /(M|Ⓜ|Ｍ|Ḿ|Ṁ|Ṃ|Ɱ|Ɯ|[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C])/g},
{
    'base': "N",
    'letters': /(N|Ⓝ|Ｎ|Ǹ|Ń|Ñ|Ṅ|Ň|Ṇ|Ņ|Ṋ|Ṉ|Ƞ|Ɲ|Ꞑ|Ꞥ|[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4])/g},
{
    'base': "NJ",
    'letters': /(NJ|[\u01CA])/g},
{
    'base': "Nj",
    'letters': /(Nj|[\u01CB])/g},
{
    'base': "O",
    'letters': /(O|Ⓞ|Ｏ|Ò|Ó|Ô|Ồ|Ố|Ỗ|Ổ|Õ|Ṍ|Ȭ|Ṏ|Ō|Ṑ|Ṓ|Ŏ|Ȯ|Ȱ|Ö|Ȫ|Ỏ|Ő|Ǒ|Ȍ|Ȏ|Ơ|Ờ|Ớ|Ỡ|Ở|Ợ|Ọ|Ộ|Ǫ|Ǭ|Ø|Ǿ|Ɔ|Ɵ|Ꝋ|Ꝍ|[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C])/g},
{
    'base': "OI",
    'letters': /(Ƣ|[\u01A2])/g},
{
    'base': "OO",
    'letters': /(Ꝏ|[\uA74E])/g},
{
    'base': "OU",
    'letters': /(Ȣ|[\u0222])/g},
{
    'base': "P",
    'letters': /(P|Ⓟ|Ｐ|Ṕ|Ṗ|Ƥ|Ᵽ|Ꝑ|Ꝓ|Ꝕ|[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754])/g},
{
    'base': "Q",
    'letters': /(Q|Ⓠ|Ｑ|Ꝗ|Ꝙ|Ɋ|[\u0051\u24C6\uFF31\uA756\uA758\u024A])/g},
{
    'base': "R",
    'letters': /(R|Ⓡ|Ｒ|Ŕ|Ṙ|Ř|Ȑ|Ȓ|Ṛ|Ṝ|Ŗ|Ṟ|Ɍ|Ɽ|Ꝛ|Ꞧ|Ꞃ|[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782])/g},
{
    'base': "S",
    'letters': /(S|Ⓢ|Ｓ|ẞ|Ś|Ṥ|Ŝ|Ṡ|Š|Ṧ|Ṣ|Ṩ|Ș|Ş|Ȿ|Ꞩ|Ꞅ|[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784])/g},
{
    'base': "T",
    'letters': /(T|Ⓣ|Ｔ|Ṫ|Ť|Ṭ|Ț|Ţ|Ṱ|Ṯ|Ŧ|Ƭ|Ʈ|Ⱦ|Ꞇ|[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786])/g},
{
    'base': "TZ",
    'letters': /(Ꜩ|[\uA728])/g},
{
    'base': "U",
    'letters': /(U|Ⓤ|Ｕ|Ù|Ú|Û|Ũ|Ṹ|Ū|Ṻ|Ŭ|Ü|Ǜ|Ǘ|Ǖ|Ǚ|Ủ|Ů|Ű|Ǔ|Ȕ|Ȗ|Ư|Ừ|Ứ|Ữ|Ử|Ự|Ụ|Ṳ|Ų|Ṷ|Ṵ|Ʉ|[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244])/g},
{
    'base': "V",
    'letters': /(V|Ⓥ|Ｖ|Ṽ|Ṿ|Ʋ|Ꝟ|Ʌ|[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245])/g},
{
    'base': "VY",
    'letters': /(Ꝡ|[\uA760])/g},
{
    'base': "W",
    'letters': /(W|Ⓦ|Ｗ|Ẁ|Ẃ|Ŵ|Ẇ|Ẅ|Ẉ|Ⱳ|[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72])/g},
{
    'base': "X",
    'letters': /(X|Ⓧ|Ｘ|Ẋ|Ẍ|[\u0058\u24CD\uFF38\u1E8A\u1E8C])/g},
{
    'base': "Y",
    'letters': /(Y|Ⓨ|Ｙ|Ỳ|Ý|Ŷ|Ỹ|Ȳ|Ẏ|Ÿ|Ỷ|Ỵ|Ƴ|Ɏ|Ỿ|[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE])/g},
{
    'base': "Z",
    'letters': /(Z|Ⓩ|Ｚ|Ź|Ẑ|Ż|Ž|Ẓ|Ẕ|Ƶ|Ȥ|Ɀ|Ⱬ|Ꝣ|[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762])/g},
{
    'base': "a",
    'letters': /(a|ⓐ|ａ|ẚ|à|á|â|ầ|ấ|ẫ|ẩ|ã|ā|ă|ằ|ắ|ẵ|ẳ|ȧ|ǡ|ä|ǟ|ả|å|ǻ|ǎ|ȁ|ȃ|ạ|ậ|ặ|ḁ|ą|ⱥ|ɐ|[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250])/g},
{
    'base': "aa",
    'letters': /(ꜳ|[\uA733])/g},
{
    'base': "ae",
    'letters': /(æ|ǽ|ǣ|[\u00E6\u01FD\u01E3])/g},
{
    'base': "ao",
    'letters': /(ꜵ|[\uA735])/g},
{
    'base': "au",
    'letters': /(ꜷ|[\uA737])/g},
{
    'base': "av",
    'letters': /(ꜹ|ꜻ|[\uA739\uA73B])/g},
{
    'base': "ay",
    'letters': /(ꜽ|[\uA73D])/g},
{
    'base': "b",
    'letters': /(b|ⓑ|ｂ|ḃ|ḅ|ḇ|ƀ|ƃ|ɓ|[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253])/g},
{
    'base': "c",
    'letters': /(c|ⓒ|ｃ|ć|ĉ|ċ|č|ç|ḉ|ƈ|ȼ|ꜿ|ↄ|[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184])/g},
{
    'base': "d",
    'letters': /(d|ⓓ|ｄ|ḋ|ď|ḍ|ḑ|ḓ|ḏ|đ|ƌ|ɖ|ɗ|ꝺ|[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A])/g},
{
    'base': "dz",
    'letters': /(dz|dž|[\u01F3\u01C6])/g},
{
    'base': "e",
    'letters': /(e|ⓔ|ｅ|è|é|ê|ề|ế|ễ|ể|ẽ|ē|ḕ|ḗ|ĕ|ė|ë|ẻ|ě|ȅ|ȇ|ẹ|ệ|ȩ|ḝ|ę|ḙ|ḛ|ɇ|ɛ|ǝ|[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD])/g},
{
    'base': "f",
    'letters': /(f|ⓕ|ｆ|ḟ|ƒ|ꝼ|[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C])/g},
{
    'base': "g",
    'letters': /(g|ⓖ|ｇ|ǵ|ĝ|ḡ|ğ|ġ|ǧ|ģ|ǥ|ɠ|ꞡ|ᵹ|ꝿ|[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F])/g},
{
    'base': "h",
    'letters': /(h|ⓗ|ｈ|ĥ|ḣ|ḧ|ȟ|ḥ|ḩ|ḫ|ẖ|ħ|ⱨ|ⱶ|ɥ|[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265])/g},
{
    'base': "hv",
    'letters': /(ƕ|[\u0195])/g},
{
    'base': "i",
    'letters': /(i|ⓘ|ｉ|ì|í|î|ĩ|ī|ĭ|ï|ḯ|ỉ|ǐ|ȉ|ȋ|ị|į|ḭ|ɨ|ı|[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131])/g},
{
    'base': "j",
    'letters': /(j|ⓙ|ｊ|ĵ|ǰ|ɉ|[\u006A\u24D9\uFF4A\u0135\u01F0\u0249])/g},
{
    'base': "k",
    'letters': /(k|ⓚ|ｋ|ḱ|ǩ|ḳ|ķ|ḵ|ƙ|ⱪ|ꝁ|ꝃ|ꝅ|ꞣ|[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3])/g},
{
    'base': "l",
    'letters': /(l|ⓛ|ｌ|ŀ|ĺ|ľ|ḷ|ḹ|ļ|ḽ|ḻ|ſ|ł|ƚ|ɫ|ⱡ|ꝉ|ꞁ|ꝇ|[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747])/g},
{
    'base': "lj",
    'letters': /(lj|[\u01C9])/g},
{
    'base': "m",
    'letters': /(m|ⓜ|ｍ|ḿ|ṁ|ṃ|ɱ|ɯ|[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F])/g},
{
    'base': "n",
    'letters': /(n|ⓝ|ｎ|ǹ|ń|ñ|ṅ|ň|ṇ|ņ|ṋ|ṉ|ƞ|ɲ|ʼn|ꞑ|ꞥ|[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5])/g},
{
    'base': "nj",
    'letters': /(nj|[\u01CC])/g},
{
    'base': "o",
    'letters': /(o|ⓞ|ｏ|ò|ó|ô|ồ|ố|ỗ|ổ|õ|ṍ|ȭ|ṏ|ō|ṑ|ṓ|ŏ|ȯ|ȱ|ö|ȫ|ỏ|ő|ǒ|ȍ|ȏ|ơ|ờ|ớ|ỡ|ở|ợ|ọ|ộ|ǫ|ǭ|ø|ǿ|ɔ|ꝋ|ꝍ|ɵ|[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275])/g},
{
    'base': "oi",
    'letters': /(ƣ|[\u01A3])/g},
{
    'base': "ou",
    'letters': /(ȣ|[\u0223])/g},
{
    'base': "oo",
    'letters': /(ꝏ|[\uA74F])/g},
{
    'base': "p",
    'letters': /(p|ⓟ|ｐ|ṕ|ṗ|ƥ|ᵽ|ꝑ|ꝓ|ꝕ|[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755])/g},
{
    'base': "q",
    'letters': /(q|ⓠ|ｑ|ɋ|ꝗ|ꝙ|[\u0071\u24E0\uFF51\u024B\uA757\uA759])/g},
{
    'base': "r",
    'letters': /(r|ⓡ|ｒ|ŕ|ṙ|ř|ȑ|ȓ|ṛ|ṝ|ŗ|ṟ|ɍ|ɽ|ꝛ|ꞧ|ꞃ|[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783])/g},
{
    'base': "s",
    'letters': /(s|ⓢ|ｓ|ß|ś|ṥ|ŝ|ṡ|š|ṧ|ṣ|ṩ|ș|ş|ȿ|ꞩ|ꞅ|ẛ|[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B])/g},
{
    'base': "t",
    'letters': /(t|ⓣ|ｔ|ṫ|ẗ|ť|ṭ|ț|ţ|ṱ|ṯ|ŧ|ƭ|ʈ|ⱦ|ꞇ|[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787])/g},
{
    'base': "tz",
    'letters': /(ꜩ|[\uA729])/g},
{
    'base': "u",
    'letters': /(u|ⓤ|ｕ|ù|ú|û|ũ|ṹ|ū|ṻ|ŭ|ü|ǜ|ǘ|ǖ|ǚ|ủ|ů|ű|ǔ|ȕ|ȗ|ư|ừ|ứ|ữ|ử|ự|ụ|ṳ|ų|ṷ|ṵ|ʉ|[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289])/g},
{
    'base': "v",
    'letters': /(v|ⓥ|ｖ|ṽ|ṿ|ʋ|ꝟ|ʌ|[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C])/g},
{
    'base': "vy",
    'letters': /(ꝡ|[\uA761])/g},
{
    'base': "w",
    'letters': /(w|ⓦ|ｗ|ẁ|ẃ|ŵ|ẇ|ẅ|ẘ|ẉ|ⱳ|[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73])/g},
{
    'base': "x",
    'letters': /(x|ⓧ|ｘ|ẋ|ẍ|[\u0078\u24E7\uFF58\u1E8B\u1E8D])/g},
{
    'base': "y",
    'letters': /(y|ⓨ|ｙ|ỳ|ý|ŷ|ỹ|ȳ|ẏ|ÿ|ỷ|ẙ|ỵ|ƴ|ɏ|ỿ|[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF])/g},
{
    'base': "z",
    'letters': /(z|ⓩ|ｚ|ź|ẑ|ż|ž|ẓ|ẕ|ƶ|ȥ|ɀ|ⱬ|ꝣ|[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763])/g}];

function removeDiacritics(str) {
    for (var i = 0; i < defaultDiacriticsRemovalMap.length; i++) {
        str = str.replace(defaultDiacriticsRemovalMap[i].letters, defaultDiacriticsRemovalMap[i].base);
    }
    return str;
}

Answer 14

Here's a very simple solution without too much code using a very simple map of diacritics that includes some or all that map to ascii equivalents containing more than one character, i.e. Æ => AE, ffi => ffi, etc... Also included some very basic functional tests

var diacriticsMap = {
  '\u00C0': 'A',  // À => A
  '\u00C1': 'A',   // Á => A
  '\u00C2': 'A',   // Â => A
  '\u00C3': 'A',   // Ã => A
  '\u00C4': 'A',   // Ä => A
  '\u00C5': 'A',   // Å => A
  '\u00C6': 'AE', // Æ => AE
  '\u00C7': 'C',   // Ç => C
  '\u00C8': 'E',   // È => E
  '\u00C9': 'E',   // É => E
  '\u00CA': 'E',   // Ê => E
  '\u00CB': 'E',   // Ë => E
  '\u00CC': 'I',   // Ì => I
  '\u00CD': 'I',   // Í => I
  '\u00CE': 'I',   // Î => I
  '\u00CF': 'I',   // Ï => I
  '\u0132': 'IJ', // IJ => IJ
  '\u00D0': 'D',   // Ð => D
  '\u00D1': 'N',   // Ñ => N
  '\u00D2': 'O',   // Ò => O
  '\u00D3': 'O',   // Ó => O
  '\u00D4': 'O',   // Ô => O
  '\u00D5': 'O',   // Õ => O
  '\u00D6': 'O',   // Ö => O
  '\u00D8': 'O',   // Ø => O
  '\u0152': 'OE', // Π=> OE
  '\u00DE': 'TH', // Þ => TH
  '\u00D9': 'U',   // Ù => U
  '\u00DA': 'U',   // Ú => U
  '\u00DB': 'U',   // Û => U
  '\u00DC': 'U',   // Ü => U
  '\u00DD': 'Y',   // Ý => Y
  '\u0178': 'Y',   // Ÿ => Y
  '\u00E0': 'a',   // à => a
  '\u00E1': 'a',   // á => a
  '\u00E2': 'a',   // â => a
  '\u00E3': 'a',   // ã => a
  '\u00E4': 'a',   // ä => a
  '\u00E5': 'a',   // å => a
  '\u00E6': 'ae', // æ => ae
  '\u00E7': 'c',   // ç => c
  '\u00E8': 'e',   // è => e
  '\u00E9': 'e',   // é => e
  '\u00EA': 'e',   // ê => e
  '\u00EB': 'e',   // ë => e
  '\u00EC': 'i',   // ì => i
  '\u00ED': 'i',   // í => i
  '\u00EE': 'i',   // î => i
  '\u00EF': 'i',   // ï => i
  '\u0133': 'ij', // ij => ij
  '\u00F0': 'd',   // ð => d
  '\u00F1': 'n',   // ñ => n
  '\u00F2': 'o',   // ò => o
  '\u00F3': 'o',   // ó => o
  '\u00F4': 'o',   // ô => o
  '\u00F5': 'o',   // õ => o
  '\u00F6': 'o',   // ö => o
  '\u00F8': 'o',   // ø => o
  '\u0153': 'oe', // œ => oe
  '\u00DF': 'ss', // ß => ss
  '\u00FE': 'th', // þ => th
  '\u00F9': 'u',   // ù => u
  '\u00FA': 'u',   // ú => u
  '\u00FB': 'u',   // û => u
  '\u00FC': 'u',   // ü => u
  '\u00FD': 'y',   // ý => y
  '\u00FF': 'y',   // ÿ => y
  '\uFB00': 'ff', // ff => ff
  '\uFB01': 'fi',   // fi => fi
  '\uFB02': 'fl', // fl => fl
  '\uFB03': 'ffi',  // ffi => ffi
  '\uFB04': 'ffl',  // ffl => ffl
  '\uFB05': 'ft', // ſt => ft
  '\uFB06': 'st'  // st => st
};

function replaceDiacritics(str) {
  var returnStr = '';
  if(str) {
    for (var i = 0; i < str.length; i++) {
      if (diacriticsMap[str[i]]) {
        returnStr += diacriticsMap[str[i]];
      } else {
        returnStr += str[i];
      }
    }
  }
  return returnStr;
}

function testStripDiacritics(input, expected) {
  var coChar = replaceDiacritics(input);
  console.log('The character passed in was ' + input);
  console.log('The character that came out was ' + coChar);
  console.log('The character expected was' + expected);
}

testStripDiacritics('À','A');
testStripDiacritics('A','A');
testStripDiacritics('Æ','AE');
testStripDiacritics('AE','AE');
testStripDiacritics('ÇhÀrlËšYŸZŽ','ChArlEsYYZZ');

Answer 15

thanks to all
I use this version and say why (because I misses those explanations at the begining, so I try to help the next reader if he is as dull as me ...)

Remark : I wanted an efficient solution, so :

• only one regexp compilation (if needed)
• only one string scan for each string
• an efficient way to find the translated characters etc ...

My version is :
(there is no new technical trick inside it, only some selected ones + explanations why)

makeSortString = (function() {
    var translate_re = /[¹²³áàâãäåaaaÀÁÂÃÄÅAAAÆccç©CCÇÐÐèéê?ëeeeeeÈÊË?EEEEE€gGiìíîïìiiiÌÍÎÏ?ÌIIIlLnnñNNÑòóôõöoooøÒÓÔÕÖOOOØŒr®Ršs?ߊS?ùúûüuuuuÙÚÛÜUUUUýÿÝŸžzzŽZZ]/g;
    var translate = {
"¹":"1","²":"2","³":"3","á":"a","à":"a","â":"a","ã":"a","ä":"a","å":"a","a":"a","a":"a","a":"a","À":"a","Á":"a","Â":"a","Ã":"a","Ä":"a","Å":"a","A":"a","A":"a",
"A":"a","Æ":"a","c":"c","c":"c","ç":"c","©":"c","C":"c","C":"c","Ç":"c","Ð":"d","Ð":"d","è":"e","é":"e","ê":"e","?":"e","ë":"e","e":"e","e":"e","e":"e","e":"e",
"e":"e","È":"e","Ê":"e","Ë":"e","?":"e","E":"e","E":"e","E":"e","E":"e","E":"e","€":"e","g":"g","G":"g","i":"i","ì":"i","í":"i","î":"i","ï":"i","ì":"i","i":"i",
"i":"i","i":"i","Ì":"i","Í":"i","Î":"i","Ï":"i","?":"i","Ì":"i","I":"i","I":"i","I":"i","l":"l","L":"l","n":"n","n":"n","ñ":"n","N":"n","N":"n","Ñ":"n","ò":"o",
"ó":"o","ô":"o","õ":"o","ö":"o","o":"o","o":"o","o":"o","ø":"o","Ò":"o","Ó":"o","Ô":"o","Õ":"o","Ö":"o","O":"o","O":"o","O":"o","Ø":"o","Œ":"o","r":"r","®":"r",
"R":"r","š":"s","s":"s","?":"s","ß":"s","Š":"s","S":"s","?":"s","ù":"u","ú":"u","û":"u","ü":"u","u":"u","u":"u","u":"u","u":"u","Ù":"u","Ú":"u","Û":"u","Ü":"u",
"U":"u","U":"u","U":"u","U":"u","ý":"y","ÿ":"y","Ý":"y","Ÿ":"y","ž":"z","z":"z","z":"z","Ž":"z","Z":"z","Z":"z"
    };
    return function(s) {
        return(s.replace(translate_re, function(match){return translate[match];}) );
    }
})();

and I use it this way :

var without_accents = makeSortString("wïthêüÄTrèsBïgüeAk100t");
// I let you guess the result,
// no I was kidding you : I give you the result : witheuatresbigueak100t

Comments :

• Tthe instruction inside it is done once (after, makeSortString != undefined)
• function(){...} is stored once in makeSortString, so the "big" translate_re and translate objects are stored once
• When you call makeSortString('something') it call directly the inside function which calls only s.replace(...) : it is efficient
• s.replace uses regexp (the special syntax of var translate_re= .... is in fact equivalent to var translate_re = new RegExp("[¹....Z]","g"); but the compilation of the regexp is done once for all, and the scan of the s String is done one for a call of the function (not for every character as it would be in a loop)
• For each character found s.replace calls function(match) where parameter match contains the character found, and it call the corresponding translated character (translate[match])
• Translate[match] is probably efficient too as the javascript translate object is probably implemented by javascript with a hashtab or something equivalent and allow the program to find the translated character almost directly and not for instance through a loop on a array of all characters to find the right one (which would be awfully unefficient).

Answer 16

I provided this answer for a similar question. It is based on quick table-lookup replacement for selected chars (latin 1+2), one for one (not possible to change German ü to "ue"), but works well for basic "normalization" to 7-bit ASCII.

TAB_00C0 = "AAAAAAACEEEEIIII" +
    "DNOOOOO*OUUUUYIs" +
    "aaaaaaaceeeeiiii" +
    "?nooooo/ouuuuy?y" +
    "AaAaAaCcCcCcCcDd" +
    "DdEeEeEeEeEeGgGg" +
    "GgGgHhHhIiIiIiIi" +
    "IiJjJjKkkLlLlLlL" +
    "lLlNnNnNnnNnOoOo" +
    "OoOoRrRrRrSsSsSs" +
    "SsTtTtTtUuUuUuUu" +
    "UuUuWwYyYZzZzZzF";

function stripDiacritics(source) {
    var result = source.split('');
    for (var i = 0; i < result.length; i++) {
        var c = source.charCodeAt(i);
        if (c >= 0x00c0 && c <= 0x017f) {
            result[i] = String.fromCharCode(TAB_00C0.charCodeAt(c - 0x00c0));
        } else if (c > 127) {
            result[i] = '?';
        }
    }
    return result.join('');
}

stripDiacritics("Šupa, čo? ľšťčžýæøåℌð")

Any other characters are converted to ?, that is result is definitely 7-bit ASCII. No regex, no magic, simple char array work.

Answer 17

I used string.js's latinise() method, which lets you do it like this:

var output = S(input).latinise().toString();

Answer 18

Assuming you know what you're doing, I suspect IE6 is not interpreting the file's encoding correctly, and hence not recognising the non-ASCII characters in the file:

• Make sure the file is saved as UTF-8 (say)
• Use Fiddler or some other tool to check that the web server is sending the correct Content-Encoding HTTP header.

(It "smells" wrong though, I'd look into doing the sorting, say on the server using something that's locale-aware... but anyway...)

Answer 19

Pass a user defined function to the Array.sort() method, and in this user defined function use String.localeCompare()

function myCompareFunction(a, b) {
  return a.localeCompare(b);
}

var values = ["pêches", "épinards", "tomates", "fraises"];

// WRONG: ["fraises", "pêches", "tomates", "épinards"]
values.sort();

 // **GOOD**: ["épinards", "fraises", "pêches", "tomates"]
values.sort(myCompareFunction);

Answer 20

This did it for me. JavaScript, Google Apps Scripts, GAS

function normalizetext(text) {
  var weird = 'öüóőúéáàűíÖÜÓŐÚÉÁÀŰÍçÇ!@£$%^&*()_+?/*."';
var normalized = 'ouooueaauiOUOOUEAAUIcC                 ';
var idoff = -1,new_text = '';
var lentext = text.toString().length -1

for (i = 0; i <= lentext; i++) {
idoff = weird.search(text.charAt(i));
if (idoff == -1) {
new_text = new_text + text.charAt(i);
} else {
new_text = new_text + normalized.charAt(idoff);
}

}
return new_text;

}

Answer 21

tested fastest way to remove diacritics from the string that covers almost all characters is this. found highest performance among all the other methods

var diacriticsMap = {
'\u0041': 'A','\u24B6': 'A','\uFF21': 'A','\u00C0': 'A','\u00C1': 'A','\u00C2': 'A','\u1EA6': 'A','\u1EA4': 'A','\u1EAA': 'A','\u1EA8': 'A',
'\u00C3': 'A','\u0100': 'A','\u0102': 'A','\u1EB0': 'A','\u1EAE': 'A','\u1EB4': 'A','\u1EB2': 'A','\u0226': 'A','\u01E0': 'A','\u00C4': 'A',
'\u01DE': 'A','\u1EA2': 'A','\u00C5': 'A','\u01FA': 'A','\u01CD': 'A','\u0200': 'A','\u0202': 'A','\u1EA0': 'A','\u1EAC': 'A','\u1EB6': 'A',
'\u1E00': 'A','\u0104': 'A','\u023A': 'A','\u2C6F': 'A',

'\uA732': 'AA',
'\u00C6': 'AE','\u01FC': 'AE','\u01E2': 'AE',
'\uA734': 'AO',
'\uA736': 'AU',
'\uA738': 'AV','\uA73A': 'AV',
'\uA73C': 'AY',
'\u0042': 'B','\u24B7': 'B','\uFF22': 'B','\u1E02': 'B','\u1E04': 'B','\u1E06': 'B','\u0243': 'B','\u0182': 'B','\u0181': 'B',

'\u0043': 'C','\u24B8': 'C','\uFF23': 'C','\u0106': 'C','\u0108': 'C','\u010A': 'C','\u010C': 'C','\u00C7': 'C','\u1E08': 'C','\u0187': 'C',
'\u023B': 'C','\uA73E': 'C',

'\u0044': 'D','\u24B9': 'D','\uFF24': 'D','\u1E0A': 'D','\u010E': 'D','\u1E0C': 'D','\u1E10': 'D','\u1E12': 'D','\u1E0E': 'D','\u0110': 'D',
'\u018B': 'D','\u018A': 'D','\u0189': 'D','\uA779': 'D',

'\u01F1': 'DZ','\u01C4': 'DZ',
'\u01F2': 'Dz','\u01C5': 'Dz',

'\u0045': 'E','\u24BA': 'E','\uFF25': 'E','\u00C8': 'E','\u00C9': 'E','\u00CA': 'E','\u1EC0': 'E','\u1EBE': 'E','\u1EC4': 'E','\u1EC2': 'E',
'\u1EBC': 'E','\u0112': 'E','\u1E14': 'E','\u1E16': 'E','\u0114': 'E','\u0116': 'E','\u00CB': 'E','\u1EBA': 'E','\u011A': 'E','\u0204': 'E',
'\u0206': 'E','\u1EB8': 'E','\u1EC6': 'E','\u0228': 'E','\u1E1C': 'E','\u0118': 'E','\u1E18': 'E','\u1E1A': 'E','\u0190': 'E','\u018E': 'E',

'\u0046': 'F','\u24BB': 'F','\uFF26': 'F','\u1E1E': 'F','\u0191': 'F','\uA77B': 'F',

'\u0047': 'G','\u24BC': 'G','\uFF27': 'G','\u01F4': 'G','\u011C': 'G','\u1E20': 'G','\u011E': 'G','\u0120': 'G','\u01E6': 'G','\u0122': 'G',
'\u01E4': 'G','\u0193': 'G','\uA7A0': 'G','\uA77D': 'G','\uA77E': 'G',

'\u0048': 'H','\u24BD': 'H','\uFF28': 'H','\u0124': 'H','\u1E22': 'H','\u1E26': 'H','\u021E': 'H','\u1E24': 'H','\u1E28': 'H','\u1E2A': 'H',
'\u0126': 'H','\u2C67': 'H','\u2C75': 'H','\uA78D': 'H',

'\u0049': 'I','\u24BE': 'I','\uFF29': 'I','\u00CC': 'I','\u00CD': 'I','\u00CE': 'I','\u0128': 'I','\u012A': 'I','\u012C': 'I','\u0130': 'I',
'\u00CF': 'I','\u1E2E': 'I','\u1EC8': 'I','\u01CF': 'I','\u0208': 'I','\u020A': 'I','\u1ECA': 'I','\u012E': 'I','\u1E2C': 'I','\u0197': 'I',

'\u004A': 'J','\u24BF': 'J','\uFF2A': 'J','\u0134': 'J','\u0248': 'J',

'\u004B': 'K','\u24C0': 'K','\uFF2B': 'K','\u1E30': 'K','\u01E8': 'K','\u1E32': 'K','\u0136': 'K','\u1E34': 'K','\u0198': 'K','\u2C69': 'K',
'\uA740': 'K','\uA742': 'K','\uA744': 'K','\uA7A2': 'K',

'\u004C': 'L','\u24C1': 'L','\uFF2C': 'L','\u013F': 'L','\u0139': 'L','\u013D': 'L','\u1E36': 'L','\u1E38': 'L','\u013B': 'L','\u1E3C': 'L',
'\u1E3A': 'L','\u0141': 'L','\u023D': 'L','\u2C62': 'L','\u2C60': 'L','\uA748': 'L','\uA746': 'L','\uA780': 'L',

'\u01C7': 'LJ',
'\u01C8': 'Lj',
'\u004D': 'M','\u24C2': 'M','\uFF2D': 'M','\u1E3E': 'M','\u1E40': 'M','\u1E42': 'M','\u2C6E': 'M','\u019C': 'M',

'\u004E': 'N','\u24C3': 'N','\uFF2E': 'N','\u01F8': 'N','\u0143': 'N','\u00D1': 'N','\u1E44': 'N','\u0147': 'N','\u1E46': 'N','\u0145': 'N',
'\u1E4A': 'N','\u1E48': 'N','\u0220': 'N','\u019D': 'N','\uA790': 'N','\uA7A4': 'N',

'\u01CA': 'NJ',
'\u01CB': 'Nj',

'\u004F': 'O','\u24C4': 'O','\uFF2F': 'O','\u00D2': 'O','\u00D3': 'O','\u00D4': 'O','\u1ED2': 'O','\u1ED0': 'O','\u1ED6': 'O','\u1ED4': 'O',
'\u00D5': 'O','\u1E4C': 'O','\u022C': 'O','\u1E4E': 'O','\u014C': 'O','\u1E50': 'O','\u1E52': 'O','\u014E': 'O','\u022E': 'O','\u0230': 'O',
'\u00D6': 'O','\u022A': 'O','\u1ECE': 'O','\u0150': 'O','\u01D1': 'O','\u020C': 'O','\u020E': 'O','\u01A0': 'O','\u1EDC': 'O','\u1EDA': 'O',
'\u1EE0': 'O','\u1EDE': 'O','\u1EE2': 'O','\u1ECC': 'O','\u1ED8': 'O','\u01EA': 'O','\u01EC': 'O','\u00D8': 'O','\u01FE': 'O','\u0186': 'O',
'\u019F': 'O','\uA74A': 'O','\uA74C': 'O',

'\u01A2': 'OI',
'\uA74E': 'OO',
'\u0222': 'OU',
'\u0050': 'P','\u24C5': 'P','\uFF30': 'P','\u1E54': 'P','\u1E56': 'P','\u01A4': 'P','\u2C63': 'P','\uA750': 'P','\uA752': 'P','\uA754': 'P',
'\u0051': 'Q','\u24C6': 'Q','\uFF31': 'Q','\uA756': 'Q','\uA758': 'Q','\u024A': 'Q',

'\u0052': 'R','\u24C7': 'R','\uFF32': 'R','\u0154': 'R','\u1E58': 'R','\u0158': 'R','\u0210': 'R','\u0212': 'R','\u1E5A': 'R','\u1E5C': 'R',
'\u0156': 'R','\u1E5E': 'R','\u024C': 'R','\u2C64': 'R','\uA75A': 'R','\uA7A6': 'R','\uA782': 'R',

'\u0053': 'S','\u24C8': 'S','\uFF33': 'S','\u1E9E': 'S','\u015A': 'S','\u1E64': 'S','\u015C': 'S','\u1E60': 'S','\u0160': 'S','\u1E66': 'S',
'\u1E62': 'S','\u1E68': 'S','\u0218': 'S','\u015E': 'S','\u2C7E': 'S','\uA7A8': 'S','\uA784': 'S',

'\u0054': 'T','\u24C9': 'T','\uFF34': 'T','\u1E6A': 'T','\u0164': 'T','\u1E6C': 'T','\u021A': 'T','\u0162': 'T','\u1E70': 'T','\u1E6E': 'T',
'\u0166': 'T','\u01AC': 'T','\u01AE': 'T','\u023E': 'T','\uA786': 'T',

'\uA728': 'TZ',

'\u0055': 'U','\u24CA': 'U','\uFF35': 'U','\u00D9': 'U','\u00DA': 'U','\u00DB': 'U','\u0168': 'U','\u1E78': 'U','\u016A': 'U','\u1E7A': 'U',
'\u016C': 'U','\u00DC': 'U','\u01DB': 'U','\u01D7': 'U','\u01D5': 'U','\u01D9': 'U','\u1EE6': 'U','\u016E': 'U','\u0170': 'U','\u01D3': 'U',
'\u0214': 'U','\u0216': 'U','\u01AF': 'U','\u1EEA': 'U','\u1EE8': 'U','\u1EEE': 'U','\u1EEC': 'U','\u1EF0': 'U','\u1EE4': 'U','\u1E72': 'U',
'\u0172': 'U','\u1E76': 'U','\u1E74': 'U','\u0244': 'U',

'\u0056': 'V','\u24CB': 'V','\uFF36': 'V','\u1E7C': 'V','\u1E7E': 'V','\u01B2': 'V','\uA75E': 'V','\u0245': 'V',
'\uA760': 'VY',
'\u0057': 'W','\u24CC': 'W','\uFF37': 'W','\u1E80': 'W','\u1E82': 'W','\u0174': 'W','\u1E86': 'W','\u1E84': 'W','\u1E88': 'W','\u2C72': 'W',
'\u0058': 'X','\u24CD': 'X','\uFF38': 'X','\u1E8A': 'X','\u1E8C': 'X',

'\u0059': 'Y','\u24CE': 'Y','\uFF39': 'Y','\u1EF2': 'Y','\u00DD': 'Y','\u0176': 'Y','\u1EF8': 'Y','\u0232': 'Y','\u1E8E': 'Y','\u0178': 'Y',
'\u1EF6': 'Y','\u1EF4': 'Y','\u01B3': 'Y','\u024E': 'Y','\u1EFE': 'Y',

'\u005A': 'Z','\u24CF': 'Z','\uFF3A': 'Z','\u0179': 'Z','\u1E90': 'Z','\u017B': 'Z','\u017D': 'Z','\u1E92': 'Z','\u1E94': 'Z','\u01B5': 'Z',
'\u0224': 'Z','\u2C7F': 'Z','\u2C6B': 'Z','\uA762': 'Z',

'\u0061': 'a','\u24D0': 'a','\uFF41': 'a','\u1E9A': 'a','\u00E0': 'a','\u00E1': 'a','\u00E2': 'a','\u1EA7': 'a','\u1EA5': 'a','\u1EAB': 'a',
'\u1EA9': 'a','\u00E3': 'a','\u0101': 'a','\u0103': 'a','\u1EB1': 'a','\u1EAF': 'a','\u1EB5': 'a','\u1EB3': 'a','\u0227': 'a','\u01E1': 'a',
'\u00E4': 'a','\u01DF': 'a','\u1EA3': 'a','\u00E5': 'a','\u01FB': 'a','\u01CE': 'a','\u0201': 'a','\u0203': 'a','\u1EA1': 'a','\u1EAD': 'a',
'\u1EB7': 'a','\u1E01': 'a','\u0105': 'a','\u2C65': 'a','\u0250': 'a',

'\uA733': 'aa',
'\u00E6': 'ae','\u01FD': 'ae','\u01E3': 'ae',
'\uA735': 'ao',
'\uA737': 'au',
'\uA739': 'av','\uA73B': 'av',
'\uA73D': 'ay',
'\u0062': 'b','\u24D1': 'b','\uFF42': 'b','\u1E03': 'b','\u1E05': 'b','\u1E07': 'b','\u0180': 'b','\u0183': 'b','\u0253': 'b',

'\u0063': 'c','\u24D2': 'c','\uFF43': 'c','\u0107': 'c','\u0109': 'c','\u010B': 'c','\u010D': 'c','\u00E7': 'c','\u1E09': 'c','\u0188': 'c',
'\u023C': 'c','\uA73F': 'c','\u2184': 'c',

'\u0064': 'd','\u24D3': 'd','\uFF44': 'd','\u1E0B': 'd','\u010F': 'd','\u1E0D': 'd','\u1E11': 'd','\u1E13': 'd','\u1E0F': 'd','\u0111': 'd',
'\u018C': 'd','\u0256': 'd','\u0257': 'd','\uA77A': 'd',

'\u01F3': 'dz','\u01C6': 'dz',

'\u0065': 'e','\u24D4': 'e','\uFF45': 'e','\u00E8': 'e','\u00E9': 'e','\u00EA': 'e','\u1EC1': 'e','\u1EBF': 'e','\u1EC5': 'e','\u1EC3': 'e',
'\u1EBD': 'e','\u0113': 'e','\u1E15': 'e','\u1E17': 'e','\u0115': 'e','\u0117': 'e','\u00EB': 'e','\u1EBB': 'e','\u011B': 'e','\u0205': 'e',
'\u0207': 'e','\u1EB9': 'e','\u1EC7': 'e','\u0229': 'e','\u1E1D': 'e','\u0119': 'e','\u1E19': 'e','\u1E1B': 'e','\u0247': 'e','\u025B': 'e',
'\u01DD': 'e',

'\u0066': 'f','\u24D5': 'f','\uFF46': 'f','\u1E1F': 'f','\u0192': 'f','\uA77C': 'f',

'\u0067': 'g','\u24D6': 'g','\uFF47': 'g','\u01F5': 'g','\u011D': 'g','\u1E21': 'g','\u011F': 'g','\u0121': 'g','\u01E7': 'g','\u0123': 'g',
'\u01E5': 'g','\u0260': 'g','\uA7A1': 'g','\u1D79': 'g','\uA77F': 'g',

'\u0068': 'h','\u24D7': 'h','\uFF48': 'h','\u0125': 'h','\u1E23': 'h','\u1E27': 'h','\u021F': 'h','\u1E25': 'h','\u1E29': 'h','\u1E2B': 'h',
'\u1E96': 'h','\u0127': 'h','\u2C68': 'h','\u2C76': 'h','\u0265': 'h',

'\u0195': 'hv',

'\u0069': 'i','\u24D8': 'i','\uFF49': 'i','\u00EC': 'i','\u00ED': 'i','\u00EE': 'i','\u0129': 'i','\u012B': 'i','\u012D': 'i','\u00EF': 'i',
'\u1E2F': 'i','\u1EC9': 'i','\u01D0': 'i','\u0209': 'i','\u020B': 'i','\u1ECB': 'i','\u012F': 'i','\u1E2D': 'i','\u0268': 'i','\u0131': 'i',

'\u006A': 'j','\u24D9': 'j','\uFF4A': 'j','\u0135': 'j','\u01F0': 'j','\u0249': 'j',

'\u006B': 'k','\u24DA': 'k','\uFF4B': 'k','\u1E31': 'k','\u01E9': 'k','\u1E33': 'k','\u0137': 'k','\u1E35': 'k','\u0199': 'k','\u2C6A': 'k',
'\uA741': 'k','\uA743': 'k','\uA745': 'k','\uA7A3': 'k',

'\u006C': 'l','\u24DB': 'l','\uFF4C': 'l','\u0140': 'l','\u013A': 'l','\u013E': 'l','\u1E37': 'l','\u1E39': 'l','\u013C': 'l','\u1E3D': 'l',
'\u1E3B': 'l','\u017F': 'l','\u0142': 'l','\u019A': 'l','\u026B': 'l','\u2C61': 'l','\uA749': 'l','\uA781': 'l','\uA747': 'l',

'\u01C9': 'lj',
'\u006D': 'm','\u24DC': 'm','\uFF4D': 'm','\u1E3F': 'm','\u1E41': 'm','\u1E43': 'm','\u0271': 'm','\u026F': 'm',

'\u006E': 'n','\u24DD': 'n','\uFF4E': 'n','\u01F9': 'n','\u0144': 'n','\u00F1': 'n','\u1E45': 'n','\u0148': 'n','\u1E47': 'n','\u0146': 'n',
'\u1E4B': 'n','\u1E49': 'n','\u019E': 'n','\u0272': 'n','\u0149': 'n','\uA791': 'n','\uA7A5': 'n',

'\u01CC': 'nj',

'\u006F': 'o','\u24DE': 'o','\uFF4F': 'o','\u00F2': 'o','\u00F3': 'o','\u00F4': 'o','\u1ED3': 'o','\u1ED1': 'o','\u1ED7': 'o','\u1ED5': 'o',
'\u00F5': 'o','\u1E4D': 'o','\u022D': 'o','\u1E4F': 'o','\u014D': 'o','\u1E51': 'o','\u1E53': 'o','\u014F': 'o','\u022F': 'o','\u0231': 'o',
'\u00F6': 'o','\u022B': 'o','\u1ECF': 'o','\u0151': 'o','\u01D2': 'o','\u020D': 'o','\u020F': 'o','\u01A1': 'o','\u1EDD': 'o','\u1EDB': 'o',
'\u1EE1': 'o','\u1EDF': 'o','\u1EE3': 'o','\u1ECD': 'o','\u1ED9': 'o','\u01EB': 'o','\u01ED': 'o','\u00F8': 'o','\u01FF': 'o','\u0254': 'o',
'\uA74B': 'o','\uA74D': 'o','\u0275': 'o',

'\u01A3': 'oi',
'\u0223': 'ou',
'\uA74F': 'oo',
'\u0070': 'p','\u24DF': 'p','\uFF50': 'p','\u1E55': 'p','\u1E57': 'p','\u01A5': 'p','\u1D7D': 'p','\uA751': 'p','\uA753': 'p','\uA755': 'p',
'\u0071': 'q','\u24E0': 'q','\uFF51': 'q','\u024B': 'q','\uA757': 'q','\uA759': 'q',

'\u0072': 'r','\u24E1': 'r','\uFF52': 'r','\u0155': 'r','\u1E59': 'r','\u0159': 'r','\u0211': 'r','\u0213': 'r','\u1E5B': 'r','\u1E5D': 'r',
'\u0157': 'r','\u1E5F': 'r','\u024D': 'r','\u027D': 'r','\uA75B': 'r','\uA7A7': 'r','\uA783': 'r',

'\u0073': 's','\u24E2': 's','\uFF53': 's','\u00DF': 's','\u015B': 's','\u1E65': 's','\u015D': 's','\u1E61': 's','\u0161': 's','\u1E67': 's',
'\u1E63': 's','\u1E69': 's','\u0219': 's','\u015F': 's','\u023F': 's','\uA7A9': 's','\uA785': 's','\u1E9B': 's',

'\u0074': 't','\u24E3': 't','\uFF54': 't','\u1E6B': 't','\u1E97': 't','\u0165': 't','\u1E6D': 't','\u021B': 't','\u0163': 't','\u1E71': 't',
'\u1E6F': 't','\u0167': 't','\u01AD': 't','\u0288': 't','\u2C66': 't','\uA787': 't',

'\uA729': 'tz',

'\u0075': 'u','\u24E4': 'u','\uFF55': 'u','\u00F9': 'u','\u00FA': 'u','\u00FB': 'u','\u0169': 'u','\u1E79': 'u','\u016B': 'u','\u1E7B': 'u',
'\u016D': 'u','\u00FC': 'u','\u01DC': 'u','\u01D8': 'u','\u01D6': 'u','\u01DA': 'u','\u1EE7': 'u','\u016F': 'u','\u0171': 'u','\u01D4': 'u',
'\u0215': 'u','\u0217': 'u','\u01B0': 'u','\u1EEB': 'u','\u1EE9': 'u','\u1EEF': 'u','\u1EED': 'u','\u1EF1': 'u','\u1EE5': 'u','\u1E73': 'u',
'\u0173': 'u','\u1E77': 'u','\u1E75': 'u','\u0289': 'u',

'\u0076': 'v','\u24E5': 'v','\uFF56': 'v','\u1E7D': 'v','\u1E7F': 'v','\u028B': 'v','\uA75F': 'v','\u028C': 'v',
'\uA761': 'vy',
'\u0077': 'w','\u24E6': 'w','\uFF57': 'w','\u1E81': 'w','\u1E83': 'w','\u0175': 'w','\u1E87': 'w','\u1E85': 'w','\u1E98': 'w','\u1E89': 'w',
'\u2C73': 'w',
'\u0078': 'x','\u24E7': 'x','\uFF58': 'x','\u1E8B': 'x','\u1E8D': 'x',

'\u0079': 'y','\u24E8': 'y','\uFF59': 'y','\u1EF3': 'y','\u00FD': 'y','\u0177': 'y','\u1EF9': 'y','\u0233': 'y','\u1E8F': 'y','\u00FF': 'y',
'\u1EF7': 'y','\u1E99': 'y','\u1EF5': 'y','\u01B4': 'y','\u024F': 'y','\u1EFF': 'y',

'\u007A': 'z','\u24E9': 'z','\uFF5A': 'z','\u017A': 'z','\u1E91': 'z','\u017C': 'z','\u017E': 'z','\u1E93': 'z','\u1E95': 'z','\u01B6': 'z',
'\u0225': 'z','\u0240': 'z','\u2C6C': 'z','\uA763': 'z',
};

function removeDicretics(str) {
    return str.replace(/[^\u0000-\u007E]/g, function (weirdo) {
        return diacriticsMap[weirdo] || weirdo;
    });
}
// Call
var cleanStr = removeDicretics("bułłśhìt"); // bullshit

Answer 22

---

function removeAccents(strAccents){
    strAccents = strAccents.split('');
    strAccentsOut = new Array();
    strAccentsLen = strAccents.length;
    var accents = 'ÀÁÂÃÄÅàáâãäåÒÓÔÕÕÖØòóôõöøÈÉÊËèéêëðÇçÐÌÍÎÏìíîïÙÚÛÜùúûüÑñŠšŸÿýŽž';
    var accentsOut = ['A','A','A','A','A','A','a','a','a','a','a','a','O','O','O','O','O','O','O','o','o','o','o','o','o','E','E','E','E','e','e','e','e','e','C','c','D','I','I','I','I','i','i','i','i','U','U','U','U','u','u','u','u','N','n','S','s','Y','y','y','Z','z'];
    for (var y = 0; y < strAccentsLen; y++) {
        if (accents.indexOf(strAccents[y]) != -1) {
            strAccentsOut[y] = accentsOut[accents.indexOf(strAccents[y])];
        }
        else
            strAccentsOut[y] = strAccents[y];
    }
    strAccentsOut = strAccentsOut.join('');
    return strAccentsOut;
}

Answer 23

I know it is "cheating" to do this on the server side, but last week I had a similar task in Javascript and I've introduced a simple java servlet and removed the accents in Java. It was really fast :)

Answer 24

I found all these a little clumsy and I'm not too expert on regular expressions, so here's a simpler version. It would be quite easy to translate it to your favourite server-side language, assuming that the string already in Unicode:

// String containing replacement characters for stripping accents 
var stripstring = 
    'AAAAAAACEEEEIIII'+
    'DNOOOOO.OUUUUY..'+
    'aaaaaaaceeeeiiii'+
    'dnooooo.ouuuuy.y'+
    'AaAaAaCcCcCcCcDd'+
    'DdEeEeEeEeEeGgGg'+
    'GgGgHhHhIiIiIiIi'+
    'IiIiJjKkkLlLlLlL'+
    'lJlNnNnNnnNnOoOo'+
    'OoOoRrRrRrSsSsSs'+
    'SsTtTtTtUuUuUuUu'+
    'UuUuWwYyYZzZzZz.';

function stripaccents(str){
    var answer='';
    for(var i=0;i<str.length;i++){
        var ch=str[i];
        var chindex=ch.charCodeAt(0)-192;   // Index of character code in the strip string
        if(chindex>=0 && chindex<stripstring.length){
            // Character is within our table, so we can strip the accent...
            var outch=stripstring.charAt(chindex);
            // ...unless it was shown as a '.'
            if(outch!='.')ch=outch;
        }
        answer+=ch;
    }
    return answer;
}

Answer 25

You can create regex's in multiple ways. Using the new RegExp-constructor:

var re = new RegExp("[a-z]", "ig") //(string pattern, string modifiers)

Or using the regex literal notation:

var re = /[a-z]/ig; // /pattern/modifiers

You have mixed the two.

Answer 26

If you are open to using a library, you can use String.js latinize: http://stringjs.com/#methods/latinise

Answer 27

$scope.legal_name = $sanitize($scope.legal_name);
    console.log("Name before function...",$scope.legal_name);

    var str = "";
    for(var i=0; i < $scope.legal_name.length; i++) {
        var charName = $scope.legal_name.charAt(i);
        if((charName == '&') && ($scope.legal_name.charAt(i + 1) == '#')){
            var count = 0;
            var subString = "";
            while(true) {
                if(($scope.legal_name.charCodeAt(i + 2 + count) > 47) && ($scope.legal_name.charCodeAt(i + 1 + count) < 58 )) {
                    subString = subString + $scope.legal_name.charAt(i + 2 + count);
                    count++;
                } else {
                    if(subString.length > 0) {
                        var value = parseInt(subString);
                        str = str + String.fromCharCode(value);
                        i = i + 1 + count; 
                        break;
                    }
                }
            }               
        } else {
            str = str + charName;
        }
    }
    $scope.legal_name = str;
    console.log("Name After function...",str);

Answer 28

The remove-accents NPM package is a pretty easy way to handle such issues:

var input = 'ÀÁÂÃÄÅ';
var output = removeAccents(input);

console.log(output); // AAAAAA

Answer 29

All the above isn't working with decomposed character as used on Mac OS. In order to remove diacritics in that case it is more simple :

r = r.replace(new RegExp(/[\u0300-\u036f]/g),"")

see comment from Olivier Miakinen on : https://groups.google.com/d/msg/fr.comp.lang.regexp/6IGJTbedGTM/G0sB2kAsR34J (posted in french)