it felt like an attack the way you phrased that
@keneda said actually 'Maybe you should try first'
As for me I'll call this a 'suggestion', certainly not an 'attack'.
I'll share some reservations about the english speaking Volla forums (did not try the german ones). I did get an answer, but it was not very informative, so finally I answered my own question (much later).
Another suggestion (feel free to characterize that as an attack if you want) could be to post a work item on the Gitlab repo for the device here
You'll be more likely to interact directly with the person(s) doing the actual porting job. There is actually a work item created already. In it the dev seems to say it's possible with 'shenanigans', maybe could give you some tips if you ask nicely.
This config screen is not totally obvious by the way. I managed after a few mistakes to select the French Azerty as the default and it displayed finally - in Qwerty 
