...that Swedish is tonal?
I'm not sure how many Indo-European languages are; my guess would be not all that many.
I forgot what the Swedish tones are called; I think they're just called "tone A" and "tone B" or something like that. I'm not sure whether they only apply to two-syllable words or also to others.
I do know that they let you distinguish between Anden "The duck" and Anden "The spirit". IIRC the pattern is something like HL for the first and HH for the second.