Sometimes this user works as a member of SWMT and helps some anti-vandalism and anti-spam works here. To know more about this user, you can see his user page on English Wikipedia. You can contact him via talk page, email or IMs (Note: Please use English).
Note: Because of this user perhaps do not know the language on this project totally, so may be sometimes he will do something wrong when he do anti-vandalism and anti-spam works. If he did something wrong, please let him know.