Author: Philippe Daouadi

Contributors:
- Savkov Alexander (kana writing test)
- Diego Sanguinetti (Spanish translation)
- WhoRegisteredAllTheGoodUsernames (Spanish translation)
- OldShatterham (word selection saving, word auto selection confirmation dialog)
- Jonathan Koehler (Keep screen on option)
- Moritz Bandemer (German translation)
- Mai Anh Ho (help with porting to Jetpack Compose and QA)
