protected function getLanguageOption()
    {
        $langPath = DIR_BASE_CORE . '/js/ckeditor4/vendor/lang/';
        $useLanguage = 'en';

        $language = strtolower(str_replace('_', '-', Localization::activeLocale()));
        if (file_exists($langPath . $language . '.js')) {
            $useLanguage = $language;
        } elseif (file_exists($langPath . strtolower(Localization::activeLanguage()) . '.js')) {
            $useLanguage = strtolower(Localization::activeLanguage());
        } else {
            $useLanguage = null;
        }

        return $useLanguage;
    }