Ip\Internal\Admin\SiteController::changeLanguage PHP Method

    public function changeLanguage()
    {
        $locale = ipRequest()->getPost('languageCode', 'en');
        $hour = 60 * 60;
        $day = $hour * 24;
        setcookie("ipAdminLocale", $locale, time() + $day * ipGetOption('Config.adminLocaleCookieExpire', 10 * 365));
        return new \Ip\Response\Json(array('success' => 1));
    }