@bigbay you are welcomed.
If you need any help creating your own image feel free to ask here.
There are resources and options to build a gernan based image.
I.e. you are even able to set some arcade games from Atari and Capcom (Dungeons and Dragons, Aliens vs. Predator, Xybots,...) to german language.
Get ready for "Münze einwerfen!" :D ("insert coin!")
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first