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 ,
Dravidian parties
DMK leaders also perceived that the attempts to declare Hindi as the sole national language of India was an attempt impose an Aryan language unwilling people in the South. According to the terms of the Indian constitution dated 26 January 1965, English as an official language of India would come to an end and Hindi would become the sole official language. However, the Madras Anti-Hindi agitation in 1965 compelled the Central Government in India change its language policy, allowing English to continue as an official language.
Although DMK was not directly involved in the violence that marred the agitation, the protest itself catapulted DMK to political power in the State in the 1967 legislative elections. Annadurai became the first non-Congress Chief Minister of the post-1950 Madras state as a result.