Contao\Controller::getSpellcheckerString PHP Method

    protected function getSpellcheckerString()
    {
        \System::loadLanguageFile('languages');
        $return = array();
        $langs = scan(__DIR__ . '/../../languages');
        array_unshift($langs, $GLOBALS['TL_LANGUAGE']);
        foreach ($langs as $lang) {
            $lang = substr($lang, 0, 2);
            if (isset($GLOBALS['TL_LANG']['LNG'][$lang])) {
                $return[$lang] = $GLOBALS['TL_LANG']['LNG'][$lang] . '=' . $lang;
            }
        }
        return '+' . implode(',', array_unique($return));
    }