GitHub - adbar/German-NLP: Curated list of open-access/open-source/off-the-shelf resources and tools developed with a particular focus on German

It includes a really cool list of corpora!

And at the end has a list of other such pages for other languages etc.

EDIT Oh wow: GitHub - asivokon/awesome-ukrainian-nlp: Curated list of Ukrainian natural language processing (NLP) resources (corpora, pretrained models, libriaries, etc.)

Also: deutschland · PyPI: “A python package that gives you easy access to the most valuable datasets of Germany.”