Mix of Genres in multiple language

I noticed I had a mess of Genres in my library, both Swedish and English.
Most likely as scanned for meta data with language setting on both as my collection have a mix both content for both languages.

Can you make tags to be consistent?
i.e. only show Documentary and not Documentary and Dokumentär.

Or are genres just simple text-tags?

A post was merged into an existing topic: Duplicate Genres