Add the menu option to set Translation source

[angrezichatterbox]

Terms

• I have searched open and closed feature requests
• I agree to follow Scribe-Android's Code of Conduct

Description

Currently the individual language settings doesn't allow the user to set the translation source for each language keyboard settings. The issue aims to add the ability to set translation source language for each language keyboard separately. This could be stored in the shared preferences for now for each language separately similar to how it is being done for period_on_double_tap.

A visual reference of how this option would look is given below.

Contribution

I would love to work on this and am more than happy to help anyone fix this issue :)

[ThousandYearGrind]

@henrikth93, Hi, does this work?

[henrikth93]

@henrikth93, Hi, does this work?

Should work now!