public function registerLanguage()
{
$language = ArrayHelper::getValue($this->clientOptions, 'lang');
if ($language === null) {
$language = Language::getCurrentCode();
$this->clientOptions = ArrayHelper::merge($this->clientOptions, ['lang' => $language]);
}
$js = 'lang' . DIRECTORY_SEPARATOR . $language . '.js';
if (file_exists($this->_assetBundle->basePath . DIRECTORY_SEPARATOR . $js)) {
$this->_assetBundle->js[] = $js;
} else {
ArrayHelper::remove($this->clientOptions, 'lang');
}
}
