Austroasiatic languages
The Austroasiatic family spoken in East and North-east India. Austroasiatic languages include the Santal and Munda languages of eastern India, Nepal, and Bangladesh, and the Mon–Khmer languages spoken by the Khasi and Nicobarese in India and in Burma, Thailand, Laos, Cambodia, Vietnam, and southern China. The Austroasiatic languages arrived in east India around 4000-3500 ago from Southeast Asia.