Rangpuri language
Rangpuri is an Indo-Aryan language. It is spoken in India and Bangladesh. Sources disagree about how many people speak it.  A 1991 census said it was spoken by 5 million people. It is a Bengali-Assamese language spoken by the Rajbanshi people in India and Bangladesh. Many are bilingual in either Bengali or Assamese. Together with Rajbanshi of Nepal and Surjapuri, it forms the KRNB lects.