Change Mode in iOS Keyboard

It would definitely be cool if it would be possible to select the language of the keyboard for the modes. So, for example, I have a mode "English messaging", and in that case I not only have the custom instruction to translate everything I say to English in case I said it in a different language, but I also would like it to switch the keyboard in that mode to English in case I have to manually correct text. While in my other mode, "German messaging", it should show the German keyboard, for example. Because otherwise autocorrect from iOS messes a lot with everything I try to correct as soon as I use the keyboard.

Yes, clearly — because right now we don't know which mode we're in. For example, I have a translator mode, so when I switch apps I end up with that mode still active even though that's not what I wanted, for instance.