AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app="myApp"></div>

JavaScript

// Including ngTranslate
angular.module("ngTranslate", ["ng"]).config(["$provide", function (n) {
    $TranslateProvider = function () {
        var n, t = {};
        this.translations = function (n, r) {
            if (!n && !r) return t;
            if (n && !r) {
                if (angular.isString(n)) return t[n];
                t = n
            } else t[n] = r
        }, this.uses = function (r) {
            if (!r) return n;
            if (!t[r]) throw Error("$translateProvider couldn't find translationTable for langKey: '" + r + "'");
            n = r
        }, this.$get = ["$interpolate", "$log", function (r, a) {
            return $translate = function (e, i) {
                var l = n ? t[n][e] : t[e];
                return l ? r(l)(i) : (a.warn("Translation for " + e + " doesn't exist"), e)
            }
        }]
    }, n.provider("$translate", $TranslateProvider)
}]), angular.module("ngTranslate").directive("translate", ["$filter", "$interpolate", function (n, t) {
    var r = n("translate");
    return {
        restrict: "A",
        scope: !0,
        link: function (n, a, e) {
            e.$observe("translate", function (r) {
                n.translationId = angular.equals(r, "") ? t(a.text())(n.$parent) : r
            }), e.$observe("values", function (t) {
                n.interpolateParams = t
            }), n.$watch("translationId + interpolateParams", function () {
                a.html(r(n.translationId, n.interpolateParams))
            })
        }
    }
}]), angular.module("ngTranslate").filter("translate", ["$parse", "$translate", function (n, t) {
    return function (r, a) {
        return angular.isObject(a) || (a = n(a)()), t(r, a)
    }
}]);

// Configuring your module, asking for ngTranslate as dependency
var app = angular.module('myApp', ['ngTranslate']);

// Configuring $translateProvider
app.config(['$translateProvider', function ($translateProvider) {

    // Simply register translation table as object hash
...