Anti-Hindi agitations of Tamil Nadu
The anti-Hindi agitations in Tamil Nadu have been ongoing intermittently in the southern Indian state of Tamil Nadu (formerly Madras State and part of Madras Presidency) since the early 20th century. The agitations involve several mass protests, riots, student and political movements in Tamil Nadu concerning the official status of Hindi in the state.
Source: Wikipedia — Anti-Hindi agitations of Tamil Nadu (CC BY-SA 4.0)