This feels a bit weird but I started working on this before thodorteo posted his MTL and I didn't have this thread on watch while mine took me more time/effort than expected.
Here's a DeepL/Google hybrid MTL for v1.02 (v21.09.20) including scripts and extensive manual edits to also translate essential bits of the quest log.
Known Issues:
-Questlog is only partially translated, because it's a massive pain to edit.
If there's significant demand I could fully translate it later.
-I know v1.03 is out by now but I cannot easily update this because of the quest log stuff.
If you experience a crash, game-breaking bug, or seriously broken text please post me a screenshot and a short description when it happened. Providing a save just before the problem occurs would drastically increase the speed of the fixing process.
Changelog:
1.0: Initial release
1.1: Fixed difficulty descriptions
1.2: Fixed a script