Explain the Three-language Formula.

The Three-language Formula is an educational policy in India aimed at promoting multilingualism and linguistic diversity. Introduced by the National Policy on Education in 1968, it suggests that school students in the country should learn three languages. The languages typically include:

1. Mother Tongue or Regional Language: The first language is the mother tongue or a regional language, ensuring that students receive education in a language familiar to them, fostering better understanding and communication skills.

2. Hindi or English: The second language is Hindi, chosen by Hindi-speaking states, and English for non-Hindi-speaking states. This choice allows for a link language that can facilitate communication across different linguistic communities.

3. Third Language: The third language can be any modern Indian language, preferably one spoken in a neighboring state. This provision aims to promote national integration by encouraging students to learn a language from a different linguistic region.

The Three-language Formula seeks to balance the promotion of linguistic diversity with the necessity of a common language for national communication. While it has been a part of India's educational policy, its implementation has varied across states, reflecting the linguistic diversity and cultural context of different regions.