Visit the Kurukh/Oraon tribe
Nepal and Bangladesh
This tribe lives both in Nepal and Bangladesh. They speak the Kurukh language which originates from the Dravidian languages and also use a lingua-franca known as Sadri to communicate with non-tribal people.
Their villages are politically organized with each post playing a different role and are also divided into several clans. The tribe tends to also be very musically- talented as seen during their social events and festivals.