This map shows various dialects of the Kamarupic sub group of Bengali-Assamese language branch of Indo-European languages. These dialects are modern descendants of Kamarupi Prakrit. The descendants are divided into two groups: Eastern and Western. There's an intermediate variation which is shown in the map. The Eastern group includes Assamese and the Western group includes Kamta lects, Surjapuriya, Rajbansi (Nepal) etc.
Own work
Msasag