Sadri language

Sadri (also Nagpuri) is an Indo-Aryan language spoken in the Indian states of Jharkhand, Bihar, Chhattisgarh and Odisha. It is the native language of the Sadaan, an ethino-linguistic group of the of Chota Nagpur region. In addition to native speaker, Sadri is also used as a lingua-fraca by large number of tribal groups such as: Kharia, Munda, Bhumij, Kurukh and many of these tribal group have adopted Sadri as their first language. It spoken by many Tea-tribes of Assam, West Bengal and Bangladesh.
Script.
In past, either Devanagari or Kaithi script were use in writing Nagpuri poems. 
 In present,
Nagpuri is commonly written in the Devanagari script.
Geographical Distribution.
Nagpuri language is chiefly spoken in western Chota Nagpur Plateau region of west-central Jharkhand in districts such as Latehar, Lohardaga, Chatra, Palamu, Garhwa, Gumla, Simdega, Ranchi, Khunti, West Singhbhum North-east Chhattisgarh in district Jashpur, Surguja, Balrampur, South-east Uttar Pradesh in Sonbhadra, Northern Odisha in Sundargarh and south-west Bihar in Aurangabad district.
Alternate names.
Alternate names of dialects include: Sadani, Sadana, Sadati, Sadari, Sadhan, Sadna, Sadrik, Santri, Siddri, Sradri, Sadhari, Sadan, Nagpuria, Nagpuri, Chota Nagpuri, Dikku Kaji, Gawari, Ganwari, Goari, Gauuari, Jharkhandhi.