Greasy Fork is available in English.
This is a cross-browser BBCode helper. It works with Gazelle and other sites . . . CDs and waffles, mmm.
I'm not sure what it could be. However, you can just disable the check by editing the script and removing "update.check()" around line 268.
I keep getting this message - "An update for WhutBBCode? is available."
I have updated it