Duplicate genre with dual languages in my library

The issue applies to the Apple TV app, both on the Apple TV 4K and on my iPad Air (gen. 3).

When I enter the Apple TV app > Library, the genre section is a mix of English and Swedish.

I have duplicates of each genre, eg.

"Comedy" AND "Komedi"

"Action & Adventure" AND "Action och äventyr"

etc.

This also make movies in the same genre split up randomly between the two different languages.

When I enter the iTunes Movies > Bought, it does not do this.

I want Swedish only. What's the solution?

Thanks in advance for any answer.

//Martin

Apple TV app > Library on Apple TV 4K:

Apple TV app > Library on my iPad Air (gen. 3):

iTunes Movies > Bought (on Apple TV 4K):