Languages spoken in India belong to several language families, the major ones being the Indo-European languages spoken by 78.05% of Indians and the Dravidian languages spoken by 19.64% of Indians, both families together are sometimes known as Indic languages.
Languages spoken by the remaining 2.31% of the population belong to the Austroasiatic, Sino–Tibetan, Tai–Kadai and a few other minor language families and isolates.
 283  India has the world’s fourth highest number of languages (447), after Papua New Guinea (840) and Indonesia (710).
Article 343 of the Constitution of India stated that the official language of the Union is Hindi in Devanagari script, with official use of English to continue for 15 years from 1947.
Later, a constitutional amendment, The Official Languages Act, 1963, allowed for the continuation of English alongside Hindi in the Indian government indefinitely until legislation decides to change it
The form of numerals to be used for the official purposes of the Union are “the international form of Indian numerals”,which are referred to as Arabic numerals in most English-speaking countries.
Despite the misconceptions, Hindi is not the national language of India; the Constitution of India does not give any language the status of national language.