public function saveLanguage()
    {
        $language = Common::getRequestVar('language');

        // Prevent CSRF only when piwik is not installed yet (During install user can change language)
        if (DbHelper::isInstalled()) {
            $this->checkTokenInUrl();
        }

        LanguagesManager::setLanguageForSession($language);
        Url::redirectToReferrer();
    }