Are extended ASCII chars [äöå] allowed in URLs?

Question

I have seen some websites that use äöå-characters in their slugs (they don't convert them to aoo). So what's the case?

Answer 1

Yes, they are!

But see here: http://stackoverflow.com/questions/1386262/should-i-use-accented-characters-in-urls

Answer 2

Åå (as in affOrd), Ää (as in Air), and Öö (as in gIrl) are our lovely Swedish additions to the latin alphabet. Nowadays, these can even be used in domain names (at least under the .SE top-level domain). See, for instance, http://www.linköping.se. Of course, this is an example of an IDN.