Yeah, at first, I've created this folder on Unraid 🤦♂️. I'm new to Docker, respectively how it works inside, so don't blame me
Then i thought about it, and it seems logical to me that it affects the container itself. So I put the file in the container. After a few attempts, it now works. My approach: while the container starts, quickly upload the traineddata file via ssh (It is necessary to do so, because the container shuts down after about 30 seconds if it has an error Only if you have any file in the /consumption folder, so make sure its empty.).
Paperless finds the file and performs OCR without errors (ant it works great!).
So the real question is, why does Paperless not download other languages after configuration?