Now that we're getting a German course for Dutch speakers...
What are some other courses that Duolingo should offer to Dutch speakers? Personally, I was thinking Spanish and French.
Yes, those would be the most logical additions. And Frisian as it is the second official language. From an historic point of view I'd say Indonesian and Yiddish. There are many people in the Netherlands who have Indonesian origins. I always wanted to learn Indonesian when I was a child. And you'd be surprised how much Yiddish you already know, especially if you live in Amsterdam. Perhaps other people have other reasons for adding different languages?
It takes volunteers who are fluent in both languages to create those courses. So unless you and poster above and/or other people are able and willing to volunteer many hours to create and develop said course suggestions, don't count on them becoming available anytime soon.
I know that, and personally I don't need it, I can learn from english. I am just responding to the question. Everything starts with a question. After all, there is German from Dutch course coming up too.