The languages of India belong to several language families, the major ones being the Indo-Aryan languages spoken by 75% of Indians and the Dravidian languages spoken by 20% of Indians.[1][2] Other languages spoken in India belong to the Austroasiatic, Sino-Tibetan, and a few other minor language families and isolates.[3]: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.