UBB.threads PHP Forum Software Community Forums UBB.threads 7 Version 7 Support Deleting other language packs - fatal error

I had some other languages on my forums but deleted them after it seems they were causing so many issues.

However, a few users had them as their default and are now telling me that they get an error message when they go to the forums it says that the language packs aren't installed. Any way to get users back to the default?

Thanks