Typos and capitalization in German localization

**Describe the bug**
There are some typos in the German localization and the capitalization doesn't follow German grammar.
The capitalization isn't really the problem, but i can't look at "Aufnhemen" any more 😄

**To Reproduce**
Steps to reproduce the behavior:
Use app in German

**Expected behavior**
No typos
Either everything is capitalized, or only nouns.

**Desktop (please complete the following information):**
all

**Additional context**
I've added a patch with the changes I would propose.
[diff.patch](https://github.com/user-attachments/files/25102617/diff.patch)