Sadri, also known as Nagpuri, is spoken in the Indian states of Bihar, Jharkhand, Orissa and the north of West Bengal, and in Bangladesh.Speakers of Sadri also use Hindi, 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.