oohhh interesting idea re record some songs with vocals in a different tongue?
COME ON PEOPLE HELP ME OUT HERE
I've already mentioned a few things.
Different kind of t-shirts, artwork (posters, postcards etc), keylards or caps (head) maybe...
And for me and I bet others as well, the Cage releases.
I'm sure there are still some master-discs (or whatever you would call them) laying around.