Languages with official status in India
The Indian constitution, in 1950, declared Hindi in Devanagari script to be the official language of the union. Unless Parliament decided otherwise, the use of English for official purposes was to cease 15 years after the constitution came into effect, i.e., on 26 January 1965. The prospect of the changeover, however, led to much alarm in the non Hindi-speaking areas of India, especially Dravidian-speaking states whose languages were not related to Hindi at all. As a result, Parliament enacted the ,
Hindi Belt
The Hindi Belt or Hindi Desh, sometimes referred to as the Hindi-Urdu Region, is a linguistic region in north-central India where Hindi (and the various languages/dialects grouped under it) and Urdu are widely spoken. Hindi belt is sometimes also used to refer to nine Indian states whose official language is Hindi and have a Hindi-speaking majority, namely Bihar, Chhattisgarh, Haryana, Himachal Pradesh, Jharkhand, Madhya Pradesh, Rajasthan, Uttarakhand , Uttar Pradesh and National Capital Territory of Delhi.