Bhojpuri has more speakers than several official languages of Europe and no place in the Eighth Schedule, which has been contested for decades. Outside India it has done better: it is a national language of Fiji in its Fiji Hindi form, an official-adjacent language in Mauritius, and the base of Sarnami in Suriname and the Netherlands and of Caribbean Hindustani in Trinidad and Guyana. In several of those places it has state support, a standardised orthography and university teaching that it lacks at home.
Standard (Western) BhojpuriIndo-Aryan, Eastern (Bihari group)
The Ara, Buxar, Ballia and Varanasi register — the base of the film and music industry that carries the name.
Speakers: About 5.05 crore in the 2011 Census, and several million more overseas
Northern BhojpuriIndo-Aryan, Eastern
Gorakhpur, Deoria, Siwan and Gopalganj, shading into Bajjika and, across the border, into the Bhojpuri of Nepal's Bara and Parsa districts.
Southern BhojpuriIndo-Aryan, Eastern
Rohtas, Kaimur and the plateau edge, shading into Nagpuri and Sadri.
Fiji Hindi, Sarnami and Caribbean HindustaniIndo-Aryan, Eastern — overseas varieties
Descended from the Bhojpuri and Awadhi of nineteenth-century indentured migrants, levelled into new standards with English, Dutch, Fijian and Creole vocabulary. Fiji Hindi is a national language; Sarnami has a written literature in the Netherlands.
Banarasi Hindi and UrduIndo-Aryan, Hindustani
The city's own register — famously blunt, dense with address terms like guru and bhaiya, and the medium of the literature that made modern Hindi prose.