"Where are mom and Aunt Toma?"
Translation:Де мама і тітка Тома?
There is, however, a keyboard layout named Ukrainian Homophonic Keyboard which does exactly that: http://tomasm.tk/images/ua-homophonic-keyboard_prop.png
Why does not accept "i" as correct with Latin alphabet? For some people is more suitable use the Russian and Latin alphabet togheter instead to use an Ukrainian keyboard. Duolingo should recognize the "i" whit the Latin alphabet when someone wants to write in Ukrainian. Thus, we can learn without inconveniences.