in line 53 on includes/classes/usu.php i changed
PHP Code:
            self::$unicodeEnabled = (@preg_match('/\pL/u', 'a')) ? true : false; 
with
PHP Code:
            self::$unicodeEnabled = (@preg_match('/\p{L}/u', 'a')) ? true : false; 
and now everything is OK

I am good in php as in English
Can I leave so this change? - everything works fine!! (in both cases also: "non-alphanumerical " and "punctuation")