Can't type non english letters in the slug field inside collection

I’m trying to set up a dynamic page with different url slugs for each page. I need to use the letters such as “å , ä , ö”" from the swedish alphabet but the slug field turns those letters in to their counterparts such as “a , a , o”. I don’t know if this is a bug or feature but I would really appreciate if i could use the appropriate letters for the pages since the visitors of the site will only consist of swedish speakers, and using the right letters just makes more sense.