gistfile1.txt

on the client side's HTML HEAD tag you include:

  <script src="/dictionary.js" type="text/javascript" charset="utf-8"></script>
  <script>
    var current_language = "italian";  
  </script>

you manage current_language variable according to user's langauge

and where translated text is needed you use the amazing <dictkey> tag:

    <dictkey>hello</dictkey>

or 'dictkeyatt' attribute that indicates which attribute of the element contains a value that should be translated:
 
    <input type="submit" value="submit" dictkeyatt="value" />

you will see that:
    <dictkey>hello</dictkey>  CHANGES TO  <dictkey>ciao</dictkey>
    
and
    <input type="submit" value="submit" dictkeyatt="value" />  CHANGES TO  <input type="submit" value="vai" dictkeyatt="value" />