Complex sentence: The Kokborok-speaking Tripuri people are the major group among 19 tribes and many subtribes; including The tribal people in Chittagong Hill Tracts and Bengali people form the linguistic majority in Tripura.
Split into simpler sentences: The Kokborok-speaking Tripuri people are the major group among 19 tribes and many subtribes. The Bengali people form the linguistic majority in Tripura.