Best practice javascript and multilanguage

Question

what is the best practice for multilanguage website using DOM Manipulating with javascript? I build some dynamic parts of the website using javascript. My first thought was

Answer 1

After reading the great answers by nickf and Leo, I created the following CommonJS style language.js to manage all my strings (and optionally, Mustache to format them):

var Mustache = require('mustache');

var LANGUAGE = {
    general: {
        welcome: "Welcome {{name}}!"
    }
};

function _get_string(key) {
    var parts = key.split('.');
    var result = LANGUAGE, i;
    for (i = 0; i < parts.length; ++i) {
        result = result[parts[i]];
    }
    return result;
}

module.exports = function(key, params) {
    var str = _get_string(key);
    if (!params || _.isEmpty(params)) {
        return str;
    }
    return Mustache.render(str, params);
};

And this is how I get a string:

var L = require('language');
var the_string = L('general.welcome', {name='Joe'});