// Client-side javascript solution follows
// (the best you can do without doing server-side scripts):

function get_language() {
    var lang;
    if (navigator.appName == 'Netscape')
	lang = navigator.language.substr(0,2)
    else
	lang = navigator.userLanguage.substr(0,2);
    if ((lang != 'fr') && (lang != 'en')) lang = 'en';
    return lang;
}