New Post: Product list with ÅÄÖ at the end?

Hi!
I'm pretty new to DNN and I've been taking over a project using NB Store as product module.
Our customer is now asking why Å and Ä comes before/after A and Ö before/after O.
I've been looking around and cant find how to filer on those characters?
ÅÄÖ should be at the end, after Z.
Are there any settings available for NB Store to fix this?
Really thankful for any ideas on how to fix this! :)

Thanks!
Isabell