Hi Mihai,

We should handle the language of keyboard wasn't supported in the Keyboard settings.
If we didn't do that, user still could disable all keyboard layouts. 

For example, user change the system language to zh-TW(Chinese), and user can disable all Keyboard layouts.
Because there is NO settings for the zh-TW(zhuyin) keyboard layout in Settings App.

So we should make sure the UX issue, how could we handle this case.
Maybe we could always change to English layout when the language is not supported in the Keyboard section of Settings App.