German from Italian
I 'd like to have a course of German for the Italian native speaker.
coming right up!
just kidding. If you want that, you will have to wait for it to be added to the incubator. However, as they add new courses from the languages they already have, it is likely to come out soon.
It'll probably turn up in incubator at some point. But in the meantime you learn two languages at the same time, which can't be that bad.
I'm learning Italian from English and as a German I'm mostly missing the differentiation between formal and informal forms, which get totally lost in English.
It's kind of the same story with Spanish from English, were the vosotros (informal you plural) gets lost in translation. They just go with the formal plural usted form all the time, which is fine for Latin America, but isn't used informally in Spain.
I'd simply try to combine Duolingo with as many alternative sources as you can find and manage in your free time to fill in the gaps. Eg. I complement my Spanish with a couple of free podcasts for language learners that contain lots of native speakers from different regions and I've already cued up some Italian ones that I'll start listening to once I finish my Italian tree.
Viel Spaß beim Lernen!