There are several languages in India belonging to different language families, the major ones being the Indo-Aryan languages spoken by 75% of Indians and the Dravidian languages spoken by southern Indians. Other languages spoken in India belong to the Austroasiatic, Tibeto-Burman, a few minor language families and isolates. 283 More than three millennia of language contact has led to significant mutual influence among the four predominant language families in mainland India and South Asia. The Constitution of India does not give any languages the status of national language. The official languages of the Union Government of the Republic of India are Hindi in the Devanagari script and English. The Eighth Schedule of the Indian Constitution lists 22 languages, which have been referred to as scheduled languages and given recognition, status and official encouragement. In addition, the Government of India has awarded the distinction of classical language to Tamil, Sanskrit, Telugu, Kannada, Malayalam and Odia.