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General -- Family-wise languages -- Scheduled languages -- Non-scheduled languages -- Bilingualism and trilingualism -- Mother tongues of scheduled tribes.

The first Language Atlas was published based on the findings of Census of India 1991. Since then Language Atlas for Census 2001 and Census 2011 have also been regularly published by the Office of the Registrar General and Census Commissioner, India. With the help of maps, the Language Atlas presents the geographical distribution of all the languages of the country. Beginning with historical and administrative perspectives, the linguistic diversity of India is represented through maps depicting the variation in speakers’ strength of major languages, the distribution of languages by language-family, distribution of Scheduled and Non-Scheduled languages of India and the incidence of bilingualism and trilingualism among the total population of India. Language Atlas 2011 contains an additional section on the mother tongues and bilingualism of Scheduled Tribes in particular.