Sadri, also known as Nagpuri, is an Eastern Indo-Aryan language spoken in the Indian states of Bihar, Jharkhand, Orissa and the north of West Bengal, and in Bangladesh. Speakers of Sadri also use Hindi, Assamese language, Oriya, and Bengali. In 1997 the population included 1,381,000 Sadani, 574,000 Nagpuri, and 165,683 Oraon. It is also spoken by the Chero tribe as first language. Sadri has become a lingua franca of Jharkhandi society. Besides speaking their own mother tongue Oraon, the members of the Munda and Kharia communities speak in Sadri with each other in many parts of Jharkhand, Orissa, Chhattisgarh, North Bengal, Assam, Andaman and Nicobar, and in other parts of India where the Jharkhandi community resides.