Google Translate

//google translate from source to target language
var callbackCount = 0;
var google  = {
    key: <google_translate_api_key_goes_here>,
    endpoint: "https://www.googleapis.com/language/translate/v2",
    language: {
        ContentType: {TEXT: "text"},
        translate: function(options, sourceCode, targetCode, callback) {
            var callbackName = "callback" + callbackCount;
            var localCallbackWrapper = function(resp) {
                callback({error: false, translation: resp.data.translations[0].translatedText});
            };
            google.language[callbackName] = localCallbackWrapper;
            callbackCount++;
            var newScript = document.createElement('script');
            newScript.type = 'text/javascript';
            var source = google.endpoint + "?key=" + google.key +
                "&source=" + sourceCode +
                "&target=" + targetCode +
                "&format=text" +
                "&q=" + encodeURI(options.text) +
                "&callback=google.language." + callbackName;
            newScript.src = source;
            document.getElementsByTagName('head')[0].appendChild(newScript);
        }
    }
};