Method setLanguageBack

public function setLanguageBack()
{
    $app = Factory::getApplication();
    $language = Factory::getLanguage();
    $newLang = Language::getInstance($this->primeLangTag);
    Factory::$language = $newLang;
    $app->loadLanguage($newLang);
    if (!empty($this->primeLangPaths)) {
        foreach ($this->primeLangPaths as $k => $v) {
            $newLang->load($k);
        }
    }
}