Hindi 

Seems like you got confused with pro-Hindustani editors. Here is 65 year old statement: 

Article 351. Directive for development of the Hindi language- 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.
http://rajbhasha.nic.in/UI/pagecontent.aspx?pc=MzU=

Hindi emerged as Apabhramsha, a degenerated form, in the 7th century A.D. By the 10th century A.D., it became stable. 'Braj, Awadhi, Khari Boli etc are the dialects of Hindi'. The present literary standard of Hindi is based on 'Khari Boli'. Hindi became the official language of India after 1947
http://hindinideshalaya.nic.in/english/hindi_orgin/briefhistory.html

Where are other languages of India ? What about Braj bhasha, Khadi Boli, Awadhi, Chattisgariya  ? They can call Hindi as much as Urdu speaking people are calling Hindi as Hindustani. The Hindi I speak has more Punjabi & English words than Urdu. The list goes on.

65 years are more than enough to change a language. We know that Hindi of 1960s is not same as Hindi of today. Even Indian English has emerged as major L2 speakers of English in last 65 years.