Thank you again! My script is here: http://hu.wikipedia.org/wiki/Szerkeszt%C5%91:BinBot/piroskat-userallap.py
This uses my own version, but I will update it to version 8504.

This script goes through wantedcategories and whenever they are inserted into a user's subpage (possibly because he/she copied an article from enwiki and began to translate, or just wrote a non-existing category to an article beeing prepared), the script puts the red category between <nowiki> tags and notifies the owner on his/her talk page. I have a community decesion to run this bot, this is important. This process makes the wantedcategories cleaner and more readable, and makes the editors to clean them up with more energy. :-)

The results may be seen at http://hu.wikipedia.org/wiki/Speci%C3%A1lis:Szerkeszt%C5%91_k%C3%B6zrem%C5%B1k%C3%B6d%C3%A9sei/BinBott, see edits on 8 September.

If anyone is interested in it, let me know, and I will help to translate.