Hello Hamza,
many thanks for your questions and suggestions. Please find my answers below:
1 - It is a very good point and we were already thinking of changing the approach to languages. Please follow this Jira issue and add comments if you wish.
2 - Unfortunately, It is currently not possible, but you can configure the settings centrally with the Android Settings Webapp. Would that solve your case? You can find info about the app here.
3 - As you pointed out… there are security implications for this approach. I would suggest you to write a Jira issue, explaining your use case. But, to be honest, I don’t think we will be able to put the password in the QR. The user sounds good though.
Please let us know if we answered your questions.
Again many thanks for your continuous contributions in the community and congratulations on your great job!
Marta