^The 2001 census records two figures, of 258 million and 442 million "Hindi" speakers. However, both figures include languages other than Standard Hindi, such as Rajasthani (ca. 80 million in independent estimates), Bhojpuri (40 million), Awadhi (38 million), Chhattisgarhi (18 million), and dozens of other languages with a million to over ten million speakers apiece. The figure of 422 million specifically includes all such people, whereas the figure of 258 depends on speaker identification as recorded in the census. For example, of the estimated 38 million Awadhi speakers, only 2½ million gave their language as "Awadhi", with the rest apparently giving it as "Hindi"[來源請求] , and of the approximately 80 million Rajasthani speakers, only 18 million were counted separately[來源請求]. Maithili, listed as a separate language in the 2001 census but previously considered a dialect of Hindi, also appeared to be severely undercounted.[來源請求]
^Constitution of India, Part XVII.—Official Language.—Art. 351. Page 217互联网档案馆的存檔，存档日期2014-09-09. Quote: "It shall be the duty of the Union to promote the spread of the Hindi language, to develop it so that it may serve as a medium of expression for all the elements of the composite culture of India and to secure its enrichment by assimilating without interfering with its genius, the forms, style and expressions used in Hindustani and in the other languages of India specified in the Eighth Schedule, and by drawing, wherever necessary or desirable, for its vocabulary, primarily on Sanskrit and secondarily on other languages."