Duolingo is a very nice app to learn languages.
I read some negative comments on learning German with it.
Still, I find it useful.
What I’d consider changing:
- I’d consider not changing the rules of the game while playing; (for example, changing the types of statistics shown, or allowing/not allowing avatars, or changing the way the point systems work)
- I’d allow for more customization;
- I’d allow for an „incognito” mode (not to be found in the list of people on the platform);
- I’d increase the number of lessons for Latin.