As I’ve spent years to build my own music database, manually labelizing each of my 3 839 albums with dBpoweramb, I’d really like to keep my metadatas.
Why?
First because they have been thought to determine the display order on my remote device (“Album” sorted by “Album Artist”, from 1 to 9 and then from A to Z)
and then because they’re in my own language (which is not English).
It would be a very good thing if the Roon application would use my own tags.
Roon enables you to customize on album or track level which metadata it should prefer (either Roon or the metadata embedded in the files). It should be able to do what you want. The only thing I’m not sure about is if Roon will be able to merge additional metadata like artist profiles, song lyrics etc. when metadata is not in English. Probably best to download and try.