The Bengali Language Movement of Manbhum was a cultural and political movement that took place in the then Bihar Province from 1912 to 1956. Post independence, between 1948 and 1956, the language movement spread intensely among the Bengalis of Manbhum. Through this movement created around the Bengali language, the public demand for the establishment of Bengali as one of the official languages of the Bihar, mainly Manbhum, was expressed. This language movement was first ever linguistic movement for Bengali language and the longest language movement in the world.