Why do you think is there any opposition to Hindi teaching which had been crystallized into a policy into an official document in 1968?

The draft of the New Education Policy 2019 states that teaching of Hindi will be made compulsory in states where it is not spoken. This was a part of the three-language formula of the Central government. The latter was vehemently opposed by the government of Tamil Nadu which said the Centre was trying to impose Hindi as it follows a two-language formula. The reference to Hindi was ultimately dropped to avoid any bigger stand-off. The three-language formula means teaching in Hindi, English and the regional language of the area. It was in the National Education Policy of 1968, that teaching of Hindi across the country was crystallised. It said that at the secondary stage the teaching of Hindi across the country should be mandatory. It had stated that even in non-Hindi states the use of the language in higher education should be encouraged. The recent policy was opposed by Tamil Nadu in line with its traditional stance which had always opposed the same. The row goes back to the official language debate wherein Hindi was passed as an official language by the Constituent Assembly but English was allowed to be the official language for the next 15 years. It was after that the official languages came into effect. Tamil Nadu is not opposed to voluntary learning of Hindi but has always stood against the three-language formula. It has also always opposed the establishment of Navodaya Schools in any part of the state.