Languages of Nepal, referred to as Nepalese languages in the country's constitution, are the languages having at least an ancient history or origin inside the sovereign territory of Nepal spoken by Nepalis. The 2011 national census listed 123 languages spoken as a mother tongue in Nepal. Most belong to the Indo-Aryan and Sino-Tibetan language families.

Santali, also known as Santal or Santhali, is the most widely-spoken language of the Munda subfamily of the Austroasiatic languages, related to Ho and Mundari, spoken mainly in the Indian states of Assam, Bihar, Jharkhand, Mizoram, Odisha, Tripura and West Bengal by Santals. It is a recognised regional language of India per the Eighth Schedule of the Indian Constitution. It is spoken by around 7.6 million people in India, Bangladesh, Bhutan and Nepal, making it the third most-spoken Austroasiatic language after Vietnamese and Khmer.