The "New Subject" button is displaying the words "Nouv.Soujet", which is french. How do I change that and in what files? If at all possible, please tell me the line number in the file I must edit, as well.

Murky Buckets.

Do you mean "New Topic" button?
Its just image, I think it was modules/newBB/images/ and new or smthng. Mod this.

But I have same temated problem. I modifed calendar.php file (and all others) to my mother language, everything works perfectly but calendar.php is still English :). How could that be? Everything is correct, only that mistake .

And editing such things:
View Account
Edit Account
Notifications
Logout
Inbox
Administration Menu

where?

Cheers, Scartissue