I got nehrim partially working on linux by using Ge-Proton7-51, but there's no sound effects. Music and voice over work, but walking and other sound effect doesn't work.

I managed to get this working useing lutris's default runner but I did have problems initialy starting a new game.
Reinstalling Nehrim again into the created prefix seemed to cure all the problems.

I also couldn't start a new game. I'd click on it and nothing would happen. Shame, too.

You may want to look thru this: https://www.protondb.com/app/1014940

Seems like the Steam version doesn't run either. But it can work if downloaded from https://sureai.net/games/nehrim/ & manually installed.

I recently managed to get the sound working by unpacking the "N - Sounds.bsa" file in Data with "BSA unpacker" from Nexus. It gives you a "sound" folder and inside of it is the "fx" folder, which I moved into Data/Sounds and it worked. Not sure what is the actual problem behind this because I also tested the GOG version of Oblivion (Both manually installed with the same Lutris config) and that worked out of the box...

It seems to work perfectly now. I'll be sure to report back if I have any more problems.

UPDATE:

Some sounds were still missing due to some errors I ignored with BSA unpacker so I used "BSA Browser" from GitHub (can't post links for some reason sorry:/)
This managed to unpack every sound file except one correctly after installing dotnet48 into the Wineprefix through Lutris and running the tool itself through the same prefix.
The one missing file is just a random trap sound that was fortunately one of the ones that the "BSA unpacker" tool managed to unpack so I have all the sounds working correctly now.