One issue with the german keybord, concerning accidentals, 0 - = :
On the english keyboard 0 - = are fine and logical and work fine for putting accidentals.
On the german keybord this functions are on the same physical keys, i.e. german keys 0 ß ´
The problem is: ´ is not a normal key, it works as modifier to produce things like á.
you hit ´ - nothing happens - then you hit a, and you get á.
To get a single ´ you have to hit ´and space.
Result: you cannot put a # to a note with german keyboard layout.
you hit ´ - nothing happens …
you hit space … playback starts, no # …