I made on Meta page [[South Slavic NPOV page]] for (primary) NPOV coordination for South Slavic Wikipedias (Bosnian, Bulgarian, Croatian, Rusyn [they live in South Slavic region even it is East Slavic language; also, they don't have Wikipedia, but they would have], Serbian and Slovenian).

Official lanugages are South Slavic (+Rusyn), but if you don't know any other, you can participate using English language.