卡西族
Sylheti belongs to the Eastern Indo-Aryan languages, that evolved from Magadhi Prakrit. The lowlands around Sylhet were originally inhabited by ancient Khasi people (Austroasiatic); and the earliest known Indo-Aryan settlements were made in the 6th century under Kamarupa king. Sylhet (Srihatta) then emerged as a center of regional territorialism after the 10th century. The 11th century Bhatera grants from the Srihatta kings Kesavadeva and Isanadeva were written in Sanskrit. Another notable copper plate inscription was found in the village of Paschimbhag in Rajnagar, Moulvibazar that was issued by King Srichandra during the 10th century.