Just reminder at first that, this is really a crude way of achieving what you want to do but it is all javascript. You can make it fancier and do more with it if you want. The only thing you can do in that case is to interprete it as unicode characters.
Unicode_Array=[... unicode for all characters you have problem with...]
// THIS ASSUMES YOUR UNICODE ARRAY HAS ALL THE CHARACTERS YOU NEEDED TO CHANGE
Real_English=[...every conversion for what you have in Unicode array...]
for (var i=0;i