Announcing this at a function to celebrate the day, state Chief Minister Mamata Banerjee said that official recognition would also be given to Rajbangshi/Kamtapuri language spoken in parts of north Bengal.
She said that around 16 lakh Oraon people spoke Kurukh language in Bengal and that the language had been identified as a vulnerable language in the UNESCO's list of endangered languages.
The chief minister lamented the apathy among a section of people in the state in learning or speaking Bengali.
"We forget to talk in Bengali sometimes. We will learn all languages, but why not Bengali also? In English-medium schools, English has to be taught, but Bengali should be learnt also," she observed.
"All languages are equal. Mother tongue must be for expressing views. How can I forget February 21 spattered with my brothers' blood? I pay my tribute to the martyrs of 1952 Language Movement," Banerjee said in a Tweet earlier in the day.