AFAIK it’s not possible, I’ll do a quick test on my end for German be English layout. Give me a second.

Can’t replicate. If I add a German keyboard it’s used by Graysky immediately. Do they rely on third party keyboards maybe? I’m not a fan of blaming the user, they might just not know their config. But to me it looks like everything works as expected.

I know that some third party keyboards rely on their own UI to set languages, so once they’re in use, they’re managing the language outside the iOS Settings. But I’m just spitballing here.

That sounds feasible, maybe? Idk, I asked the reviewer for more details

Sounds great, let us know if you get any more info !