a user only knows a language if they contribute
a user only knows a language if they contribute

jrmerz/osrc,pombredanne/osrc,dfm/osrc,errietta/osrc,errietta/osrc,dfm/osrc,jrmerz/osrc,dfm/osrc,YanjieGao/osrc,errietta/osrc,YanjieGao/osrc,YanjieGao/osrc,jrmerz/osrc