foreign language metal cd's

Dude, what genre?
Anyway there are lots of black metal in norwegian if you're into that kinda stuff. Ulver's first two albums "Bergtatt" and "kvellsänger" are in norwegian, and Bergtatt is actually a great album, although I enjoy Ulvers later achievements more.
Arcturus did a couple of songs in norwegian on the Aspera Hiems Symphonia album, which were pretty good.
Theatre of Tragedy did a couple of songs in german, "Der Spiegel" and "Der Tanz der Schatten" and there's always Rammstein.
Don't know any thrash bands singing in those languages, tho...

But check out:
http://www.swedishmetal.net/
http://www.germanmetal.com/

Maybe you'll be able to find some bands in there...

Cheers
Niels K
www.nielsk.dk