KWrite spell check. How to select German?

Attempts to select German (CH) as spell check langauge fail.

How do I select German?

Operating System: Fedora Linux 44
KDE Plasma Version: 6.7.5
KDE Frameworks Version: 6.30.0
Qt Version: 6.11.2
Kernel Version: 7.2.8-200.fc44.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen AI 9 HX 370 w/ Radeon 890M
Memory: 16 GiB of RAM (11.5 GiB usable)
Graphics Processor: AMD Radeon 890M Graphics

I’m not sure which dialog box you are looking at, but poking around myself I think I see what you mean:

The menu in kwriter and kate under Settings > Configure Language... dialog box does not scroll as expected when clicked with the mouse. (Also in konsole, dolphin and any other KDE software I’ve tried with a Configure Language... dialog. It looks like a bug to me and sure enough it’s been reported here although not yet confirmed.

It seems that opening the menu, closing it (either by clicking outside of the menu or by pressing Esc, then opening the menu again lets you scroll the menu with your scroll wheel or the ↑ and ↓ keys. Try that.

i’ve confirmed the bug report

same thing happens here on my plasma 5 install