An error of Swedish
Why there are no å, ä, ö there?
They have already said they are working on it.
If you are on a Mac:
alt+u then a = ä
alt+u then o = ö
alt+a = å
If you are not, you could probably just google what the shortcuts are.
I use the English international keyboard on my PC, there are tutorials on how to get different keyboard layouts on YouTube. With the international keyboard you can pretty much type every letter you're going to need: çéàï and such for French, ßäöü for German, äåö and other letters for Swedish and so on.
On the iphone it is even easier: you just hold the letter and a list appears.