 The 1961 census recognized 1,652 "mother tongues", counting all declarations made by any individual at the time when the census was conducted.However, the declaring individuals often mixed names of languages with those of dialects, sub-dialects and dialect clusters or even castes, professions, religions, localities, regions, countries and nationalities.The list therefore includes "languages" with barely a few individual speakers as well as 530 unclassified "mother tongues" and more than 100 idioms that are non-native to India, including linguistically unspecific demonyms such as "African", "Canadian" or "Belgian".