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Nepali is a language in the Indo-Aryan languages . It is the official language and de facto lingua franca of Nepal and is also spoken in Bhutan. Nepali has official language status in the formerly independent state of Sikkim and in West Bengal's Darjeeling district. Nepali developed in proximity to a number of Indo-Aryan languages, most notably Pahari and Magahi, and shows Sanskrit influences. However, due to Nepal's geographical area, the language has also been influenced by Tibeto-Burman. Nepali is mainly differentiated from Central Pahari, both in grammar and vocabulary, by Tibeto-Burman idioms due to close contact with the respective language group.
Historically, the language was first called Khaskura (language of the khas 'rice farmers'), then Gorkhali or Gurkhali (language of the Gorkha Kingdom) before the term Nepali was taken from Nepal Bhasa. Other names include Parbatiya ("mountain language", identified with the Parbatiya people of Nepal) and Lhotshammikha (the "southern language" of the Lhotshampa people of Bhutan).

https://en.wikipedia.org/wiki/Nepali_language