Nepali or Nepalese is a language in the Indo-Aryan branch of the Indo-European language family. It is the official language and de facto lingua franca of Nepal and is also spoken in Bhutan and parts of India. In India, it is one of the country's 23 official languages: 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 Tibeto-Burman languages, most notably Kirati and Gurung, and shows Tibeto-Burman influences. Wikipedia
Bhutan