Bagheli is an Eastern Hindi language, descended from Ardhamagadhi Prakrit by way of Magadhi Apabhramsa, and grouped with Awadhi and Chhattisgarhi. This is the single most useful fact about the region. Bundeli immediately to the west is Western Hindi and descends from Sauraseni — a different Prakrit — so the boundary between the two, running along the Panna and Satna uplands, separates two branches of Indo-Aryan rather than two accents. What crosses it is grammar: verb endings, the copula, the shape of the future and the past. A Bagheli speaker and an Awadhi speaker two hundred and fifty kilometres apart understand each other more easily than a Bagheli speaker and a Bundeli speaker forty kilometres apart. The 2011 Census returned about 2.7 million Bagheli speakers and classified the language as a dialect of Awadhi; Grierson's Linguistic Survey treated it as a language in its own right, and Awadhesh Pratap Singh University at Rewa teaches it as one.
Standard Bagheli (Rewa)Indo-Aryan, Eastern Hindi
The Rewa, Satna and Maihar register — the prestige variety, the one used in Bagheli broadcasting on All India Radio and in the region's published literature.
Speakers: About 2.7 million returned in the 2011 Census, under a classification that folds it into Awadhi
Western BagheliIndo-Aryan, Eastern Hindi
The Satna, Panna-edge and Chitrakoot belt, heavily overlaid with Bundeli vocabulary while keeping Eastern Hindi verb morphology — which is exactly what a transition zone between two Prakrit stocks looks like.
Southern BagheliIndo-Aryan, Eastern Hindi
Shahdol, Umaria and Sidhi, shading into Chhattisgarhi. Speakers here are frequently bilingual in Gondi, and Gondi loan vocabulary for trees, tools and forest produce is normal in ordinary speech.
North-eastern BagheliIndo-Aryan, Eastern Hindi
The Sonbhadra, Mirzapur and Prayagraj fringe, where Bagheli meets Awadhi and Bhojpuri at the foot of the Kaimur scarp and the three become hard to separate in practice.
GondiDravidian, South-Central
Not a variety of Bagheli at all but the other language of the region — a Dravidian language spoken across the Son valley forest districts, structurally unrelated to everything around it, and in steep decline as speakers shift to Bagheli and Hindi.