The Koch are a small trans-border ethnic group of Assam and Meghalaya in India and northern Bangladesh. The group consists of nine matrilineal and strictly exogamous clans, with some of them preserving a hitherto sparsely documented Boro-Garo language called Koch, whereas others have switched to local varieties of Indo-Aryan languages. It is a Scheduled Tribe in Meghalaya, India. Koches want to preserve language and culture and heritage.