applyIEFont = function() {
var iev=0;
var ieold = (/MSIE (\d+\.\d+);/.test(navigator.userAgent));
var trident = !!navigator.userAgent.match(/Trident\/7.0/);
var rv=navigator.userAgent.indexOf("rv:11.0");
if (ieold) iev=new Number(RegExp.$1);
if (navigator.appVersion.indexOf("MSIE 10") != -1) iev=10;
if (trident&&rv!=-1) iev=11;
if(iev == 11 || iev == 10) {
$('.menuCaption').css({ font: 'normal 34px arial, "SegoeUi"'});
}
};
setInterval(applyIEFont, 300);
$(document).ready(applyIEFont);
look this code. Conditional comments doesn't work in ie11, so you have to do it with js