incorrect lang  #410

       var userLanguage = navigator.language || navigator.userLanguage || 'en';

                var parts = userLanguage.toLowerCase().match(/([a-z]+)(?:-([a-z]+))?/);
                var lang = parts[1];
                var locale = parts[2];

                if (languages[lang + '-' + locale]) {
                    lang = lang + '-' + locale;
                } else if (!languages.indexOf(lang)) {
                    lang = 'en';
                }