Hi!
Thanks to Mehdi Sadeghi the RTL support is merged in master branch!
https://github.com/instead-hub/instead
https://user-images.githubusercontent.com/3101557/89707728-2300ac80-d971-11ea-9334-4de9f237d1f8.png
To use RTL feature you need enable WITH_HARFBUZZ CMAKE flag. SDL2_ttf should be compiled with HarfBuzz too (default off)
There is game tag added -- Direction: rtl|auto.