Great mod, thanks!
I have translated Invite.english.php to Invite.french-utf8.php. I'm happy to share it if you're interested.
I've got an issue though: the invitation system only uses the forum's default language, regardless of the user's preference. ( I also installed the language button mod, and it doesn't have an effect.). Is there something I can do to capture the current language selection? I'm happy to tweak the code, I know PHP.
Thanks in advance!