The list of languages, as of today, comprises the following:
- Belarusian
- Czech
- German
- Estonian
- English
- Spanish
- French
- Hebrew
- Lithuanian
- Latvian
- Romanian (thanks to Eddie)
- Russian
- Ukranian
It seems that more Mediterranean languages like Catalan, Italian, and Greek would be welcome
By the way, there is a way to make virtual keyboards in those languages too, but I haven't been able to elaborate one.