Bastar is a Dravidian-speaking region with an Indo-Aryan lingua franca, which is unusual anywhere in India. Gondi — Dravidian, in Muria, Maria, Dorli and Koya varieties — is the language of the forest villages, but it is not mutually intelligible across all of them. Halbi, an Indo-Aryan language sitting between Marathi, Chhattisgarhi and Odia, became the market and administrative tongue and is now a first language for many households that have no Marathi or Odia ancestry at all. A trader who works the haat circuit needs Halbi and some Gondi; a bureaucrat needs Halbi and Hindi; nobody needs all four.
HalbiIndo-Aryan, Eastern
The lingua franca of the plateau and the language of the weekly haat, of Bastar Dussehra's public proceedings and of most Bastar folklore in print. It carries Marathi and Odia features at once, which is what a trade language between three linguistic regions looks like.
बोलने वाले: Around 7.7 lakh returned in the 2011 Census, with far more using it as a second language
Gondi (Muria and Maria)Dravidian, South-Central
Written in Devanagari where it is written at all. Abujhmaria, spoken on the Abujhmarh massif, is the most conservative variety and is not readily understood by Gondi speakers from the plateau edge.
बोलने वाले: Around 29 lakh Gondi speakers nationally, of whom a large minority are in this region
BhatriIndo-Aryan, Eastern
Spoken by Bhatra households on the eastern plateau and closely related to Halbi and to Odia's western dialects. Its speakers are often counted under Halbi or Odia in census returns.
Parji (Dhurwai)Dravidian, Central
The Dhurwa language, spoken around Jagdalpur and into Koraput. Central Dravidian rather than South-Central, which makes it a separate branch from Gondi despite the two being spoken in the same villages.
ChhattisgarhiIndo-Aryan, Eastern Hindi
Strongest in the towns and in the northern districts towards Kanker, where the plateau meets the Chhattisgarh plains, and increasingly the school and shop language everywhere.