Hi!
Currently warnfile.py is giving summary messages like this one:
warnfile - adding: en, modifying: fr
I think this is bad because people who are not familiar with pywikipediabot don't know what a warnfile is.
I would suggest using a summary message which makes clear what the bot is really doing, e.g.
Bot: Changing interwiki without validation: adding: en, modifying: fr
What do you think about it?
Daniel