Why not translate mobile apps in addition to the web?
As an iOS developer, I would really like to see this feature added to Duolingo.
Maybe the translation could be done with the help of a video of the app in action so you don't need to install it on your mobile device.
As an Android developer I wholeheartedly agree with this. I was thinking it would be a semi-cheap translation service (after all, this is free language learning that should ideally earn the site owners money) that developers could then use. Maybe a price per sentence, line or word?