Using Swedish letters in a Glossary?

I need to build a Glossary in Engage, but the problem is that it only covers letters from A to Z - and in Sweden we have other ones like Å, Ä and Ö. Is there any way for me to make changes to the Glossary to put in those letters?

What I need is of course for those letters to be clickable in the list with letters. As you see in the picture my words starting with Å and Ö shows and is arranged in the right order, but doesn't show in the list.

Anyone with a suggestion on what to do?

//Peter