The languages of India primarily belong to two major linguistic families, Indo-European (whose branch Indo-Aryan is spoken by about 70% of the population) and Dravidian (spoken by about 22%). Two contact languages have played an important role in the history of India: Persian and English. Other languages spoken in India come mainly from the Dardic language family, the Austro-Asiatic and Tibeto-Burman linguistic families, as well as a few language isolates. The Indo-European and Dravidian languages of India (which formed the basis of European language), include: