$(document).ready(function() {
var known = { en: true, fr: true, pt: true };
var lang = ((navigator.languages && navigator.languages[0]) || navigator.language || navigator.userLanguage || 'en').substr(0, 2);
if(!known[lang])
lang = 'en';
// Find all
s with a class of "wrapper" and lang attribute equal to `lang`
// and make them visibile.
console.log("texte")
$('div.wrapper[lang=' + lang + ']').show();
// Find all
s with a class of "wrapper" and lang attribute not equal
// to `lang` and make them invisibile.
$('div.wrapper[lang!=' + lang + ']').hide();
});