sadri (nagpuri) is an eastern indo-aryan language spoken in the indian states of jharkhand, bihar, chhattisgarh and odisha. it is sometimes considered a hindi dialect. it is native language of the sadan. in addition to native speakers, it is also used as lingua franca by many tribal groups such as kharia, munda and kurukh, and a number of speakers of these tribal groups have adopted it as their first language. it is also used as a lingua franca among tea-garden community of assam, west bengal and bangladesh. according to the 2011 census, there were approximately 5,130,000 native speakers of the nagpuri language, including 19,100 identifying as gawari, 4,350,000 as "sadan/sadri" and 763,000 as "nagpuria".