Try using a redirected URL. You can create the other (non-content) pages (www.mypage.com/en-il/) and add to the header a redirect:
<html>
<head>
....
<script>
// this will load the corresponding page
window.location.assign("http://www.mypage.com/en-uk/");
</script>
</head>
<body>
<!-- empty -->
</body>
</html>
Here is a second example where you can do the redirect from a single 404 page. Just place this code at the top level (home) of the web site in a page named 404.shtml
<html>
<head>
<script>
window.onload = function()
{
// Get the referring URL
var ref = '<!--#echo var="REDIRECT_URL"-->';
// Break into components
//
comp = ref.split('/');
if ( comp.length > 1 )
{
switch ( comp[ 1 ] )
{
case "en-br":
case "en-il": // this will load the corresponding page
window.location.assign("http://www.mypage.com/en-uk/");
break;
}
}
</script>
</head>
<body>
<!-- 404 page handling here -->
</body>
</html>