The normal thing is that a server provides you a page in a special language and if you choose an other language he browser fetches the hole page gain from the server witgh the new language given.
<html>
<head>
<@jet.js_cm/>
<@jet.css_lang/>
</head>
...
With the following simple command you can define a client message:
<@jet.m key="lbl.firstname"/>For inserting the language selection with flags, just put the following command in your freemarker template:
<@jet.languages/>
