The Tibetic languages are a cluster of Tibeto-Burman languages descended from Old Tibetan, spoken across a wide area of eastern Central Asia bordering the Indian subcontinent, including the Tibetan Plateau and the Himalayas in Baltistan, Ladakh, Nepal, Sikkim, Bhutan, Assam and Arunachal Pradesh. Classical Tibetan is a major regional literary language, particularly for its use in Buddhist literature.