Duolingo Duel suggestion
I had a fun idea (for people who like a little 'challenge' on duolingo) their could be a button that said 'duolingo duel' and you could click on it and challenge your friend/friends to a duolingo duel (aka everybody get words and the first person to win gets a bonus of five skill points,
I think it would be fun!
We don't need Duolingo to battle. Meet me on the wrong side town in a back alley at midnight. You better be packing because I will be packing a Spanish/English dictionary. Be prepare for no holes barred combat. I will show no mercy, you can expect a steady stream of rarely used idiomatic phrases.
I've been hoping for this feature too!! :D It could be based on "practice all skills", so we can challenge friends learning any language at any level.. I love the ideal of battling against someone who's also online and the better I do, the more hearts I take away from the other person (and vice versa; maybe we need more hearts for this :P), so it's really interactive!
Or it could be a turn-by-turn type battle.. maybe best of three/five (standard sets of 20 questions)?