Im thankful to know that duolingo has many languages to learn but I was wondering if we can suggest new languages? Personally I would like to learn Bosnian (which is similar to Croatian and Serbian) and is curious if anyone else would want to ask for a suggestion
Unfortunately, Duolingo have already stated that they won't teach dialects. They've made it clear that they have no plans to teach different dialects of Chinese or Arabic, for example, and these are sometimes not mutually comprehensible. The chances to see four courses for four perfectly mutually comprehensible dialects are somewhere between minimal and non-existing, I think. My guess is that, if Duolingo decides to teach BCSM languages they will either teach a standardised version, if one exists, or teach the dialect spoken by the largest amount of people (which I think is Serbian).