Is there a key on the bottom left hand corner of your keyboard that looks like a globe? If so, hit that and it will change the keyboard locale. It should also tell you what it's changing to, so if it says "swedish" you should have your letters.
If that doesn't work, then you can hold your finger down on the aeiou keys to get the varients of the letters with accents and umlauts above them, not sure if they are what you want.