Typing with Abkhazian letters.
«Рыдыркыра» - Abkhazian keyboard app. Get it for free and enjoy. After downloading the app go to: Settings > General > Keyboard > Keyboards > Add New Keyboard > and choose «Рыдыркыра», Tap newly added «Рыдыркыра» and switch to Allow Full Access in order to use all the options.
The app itself has it’s own settings.
P.S. Don’t delete the app, otherwise the keyboard will be deleted as well.