Explanation:

Assamese is an Indo-Aryan language spoken mainly in the northeast Indian state of Assam, where it is an official language. It is the easternmost Indo-European language, spoken by over 14 million speakers, and serves as lingua franca of the region. Nefamese, an Assamese-based pidgin, is used in Arunachal Pradesh, and Nagamese, an Assamese-based Creole language, is widely used in Nagaland. The Kamtapuri language of Rangpur division of Bangladesh and the Cooch Behar and Jalpaiguri districts of India are linguistically closer to Assamese, though the speakers identify with the Bengali culture and the literary language. In the past, it was the court language of the Ahom kingdom from the 17th century.