FluidTYPO3\Vhs\ViewHelpers\Condition\Page\IsLanguageViewHelper::evaluateCondition PHP Method

    protected static function evaluateCondition($arguments = null)
    {
        $language = $arguments['language'];
        $defaultTitle = $arguments['defaultTitle'];
        $currentLanguageUid = $GLOBALS['TSFE']->sys_language_uid;
        if (true === is_numeric($language)) {
            $languageUid = intval($language);
        } else {
            $row = $GLOBALS['TYPO3_DB']->exec_SELECTgetSingleRow('uid', 'sys_language', "title='" . $language . "'");
            if (false !== $row) {
                $languageUid = intval($row['uid']);
            } else {
                if ((string) $language === $defaultTitle) {
                    $languageUid = $currentLanguageUid;
                } else {
                    $languageUid = -1;
                }
            }
        }
        return $languageUid === $currentLanguageUid;
    }