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 <a href="https://en.wikipedia.org/wiki/Kamarupi_Prakrit" class="extiw" title="w:Kamarupi Prakrit">Kamarupi Prakrit</a>. 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.
<a href="//commons.wikimedia.org/w/index.php?title=User:Msasag&amp;action=edit&amp;redlink=1" class="new" title="User:Msasag (page does not exist)">Msasag</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>