Some feedback: When you start the intro, and it says "Hi, what language do you want to learn" the button should be labeled "Select..." not a default language. It was unclear I had to click it to select a different language. The languages in the app, and on your FAQ about which languages are available, aren't in sync.
One other thing is with alphabets. If I highlight over a word, and you could show me how to sound out the word in latin characters, that would be super helpful and no other language app I know of does that.
The "Select..." makes a lot of sense