public function getLangName( $lang = false ) {
		$lang = $lang ? $this->normalizeLang( $lang ) : $this->getLang();
		return $this->getLangNames()[$lang] ?? '';
	}
public function getLangName( $lang = false ) {
		$lang = $lang ? $this->normalizeLang( $lang ) : $this->getLang();
		return $this->getLangNames()[$lang] ?? '';
	}
public function getLangName ( $ lang = false ) { $ lang = $ lang ? $ this -> normalizeLang ( $ lang ) : $ this -> getLang ( ) ; return $ this -> getLangNames ( ) [ $ lang ] ?? '' ; }
Return the language name in the native language.
@param string $lang [optional] Language code
@return string
Return the language name in the native language .