- https://github.com/Julow/Unexpected-Keyboard
- https://github.com/Julow/Unexpected-Keyboard/blob/master/doc/Custom-layouts.md
- https://github.com/Julow/Unexpected-Keyboard/blob/master/doc/Possible-key-values.md
- https://unexpected-keyboard-layout-editor.lixquid.com/
messagease_for_unexpected_keyboard.xml
: a solid messagease layout that includes more symbols/keys than most implementations