From my research, I'd have to download another ROM in order to receive different languages.
As for the wonder card, I didn't make a backup, but using the data from the wiki changed the Used bit to Unused.
Oh, it must be trying to restore to the Acekard. Since I misplaced my DS lite, I can't actually run the program, so I guess switch the flashcart as soon as possible, even before you tell it to restore.