Nagpuri (also known as Sadri) is an Indo-Aryan language spoken in the Indian states of Jharkhand, Chhattisgarh and Odisha.

[2][7][8] It is the native language of the Sadan, the Indo-Aryan ethnic group of Chota Nagpur plateau.

[8] It is also used as a lingua franca among the Tea-garden community of Assam, West Bengal and Bangladesh who were taken as labourers to work in the tea gardens during the British Period.

[12] Similarly, the Sadani term derived from the languages of Sadan ethnolinguistic group of Chotanagpur.

The Sadani also refer to closely related Indo-Aryan languages of Jharkhand such as Nagpuri, Panchpargania, Kurmali and Khortha.

There is an opposition against the use of the word Sadri and giving two names Sadan/Sadri and Nagpuria, to a single language in the upcoming Indian census.

[11][13][14] Alternate names of Nagpuri language include: Sadani, Sadana, Sadati, Sadari, Sadhan, Sadna, Sadrik, Santri, Siddri, Sradri, Sadhari, Sadan, Nagpuria, Chota Nagpuri, Dikku Kaji, Gawari, Ganwari, Goari, Gauuari, Jharkhandhi.

According to Peter Shanti Navrangi, Nagpuriya Sadani or Nagpuri originated from ancient Prakrit.

In 1903, Sir George Abraham Grierson classified Nagpuri as the Nagpuria dialect of the Bhojpuri language in his "Linguistic Survey of India".

[25][26][27] Some academics oppose inclusion of Hindi dialects in the Eighth Schedule of the Constitution as full-fledged Indian languages.

[7] The Nagpuri language spoken in different districts such as Ranchi, Gumla, Simdega and Garhwa varies with each other.

The poet Ghasi Ram Mahli wrote several works, including "Nagvanashavali", "Durgasaptasati", "Barahamasa", "Vivha Parichhan" etc.

E.H.Whitley wrote Notes on the Ganwari dialect of Lohardaga, Chhota Nagpur in 1896, which considered the start of writing prose in the nagpuri language.

[34] Some Nagpuri language writers and poets in the modern period are Praful Kumar Rai, Sahani Upendra Pal Singh, Shiv Avtar Choudhary, Lal Ranvijay Nath Shahdeo, Bisheshwar Prasad Keshari and Girdhari Ram Gonjhu.