i18n.js

var i18nModule = angular.module('i18nModule', []);

i18nModule.factory('i18n', function() {
    var tokenRE = /\$\{(?:(?:(\d+)|([a-z_][\w\-]*))(?::([a-z_\.]+)(?:\(([^\)]*?)?\))?)?)\}/gi;
    var evaluate = function(text, values) {
        var fn = function(match, index, name, formatFn, args) {
            if (name === null || name === '') {
                name = index;
            }
            if (values[name]) {
                return values[name];
            }
            return match;
        };
        return text.replace(tokenRE, fn);
    };  

    return {
        translate: function(msgId, params) {
            var ret = msgId;
            if (TRANSLATIONS[msgId]) {
                ret = TRANSLATIONS[msgId];
            }
            if (params) {
                ret = evaluate(ret, params);
            }
            return ret;
        }
    };  
});