My problem with this (as a non-native english speaker) is that such solutions often only support latin based languages and cyrillic is completely left out. This will probably make it impossible to write, as auto-complete will not work well.
Otherwise, it looks interesting, but I am a bit skeptical.
good luck to the dev team
Most non English languages don't work with these. My main language speaker count is 1 miljon. I am not going to get auto-correction for this anywhere soon(assuming it uses it). And my language happens to have some special letters, so without changing keyboard, you can't just switch vocabulary(we bypass it by using numbers, but this makes text non computer readable).
Otherwise, it looks interesting, but I am a bit skeptical. good luck to the dev team