I would agree.
What I did do, was uninstall the invite bot from cb plugins page, which didn't help. I actually had to reinstall it completely, and not just uninstall the old one.
I DID search the forum!
If more people have these problems, perhaps your readme.txt is not reaching everyone. Perhaps you should rephrase it, so even people who don't feel that joomla installs etc. are just "simple" and easy understand completely. .. Like a dummies guide.. I'll be the first...
Seriosly though, I didn't actually read the meaning you intended in the readme.
Perhaps you should include this problem in the readme.. like a little note: If you receive a 'No laguage ...' please note that you must reinstall all plugins to correct this error'
Something so everyone understands..
just my 2 cents..