Magadhi Prakrit
The Eastern Indo-Aryan languages, also known as Māgadhan languages, are spoken throughout the eastern Indian subcontinent (East India and Assam, Bangladesh), including Bihar, Jharkhand, Bengal, Tripura, Assam, and Odisha; alongside other regions surrounding the northeastern Himalayan corridor. Bengali is official language of Bangladesh and the state of West Bengal and Tripura, while Assamese and Odia are the official languages of Assam and Odisha, respectively. The Eastern Indo-Aryan languages descend from Magadhan Apabhraṃśa and ultimately from Magadhi Prakrit.