Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Troubleshooting Mod in English In-game instead of chosen language

If you didn't change anything in the lsb file, did you try replacing the updated file with the original version? (ie, restoring the original UUIDs)
If there were changes to the content of the file, other than new UUIDs, replacing the entire file wouldn't work, since it would revert things you want to change.