If a file name has Un, it will be removed and 8 Un will be added to the end. Tagging will still work but the 8 Un will remain at the end of the file (before the checksum).
The regex is faulty for a few things. Mostly between skin and hair colors. Adding pale blue skin will tag blue skin and blue hair. Black_Gray will add black and gray etc. The existing (?<!izes) do not work either. Apparently ?<! works for prefixes while ?! for suffixes.
Adding a number for the amount of pictures with the current filters on would be nice.