Odia is primarily spoken in the state of Odisha, while Bengali, Hindi, and Santali are widely spoken in West Bengal.

Maithili is primarily spoken in the Mithila region of Bihar, with significant populations also found in neighboring states like Jharkhand and Uttar Pradesh.

Santali is an Austroasiatic language spoken by the Santal people, primarily in the states of Jharkhand, West Bengal, and Odisha.

Assamese is the official language of the state of Assam and is widely spoken throughout the region.

Kokborok is a Tibeto-Burman language spoken by the Tripuri people, primarily in the state of Tripura.

Nicobarese is an Austroasiatic language spoken by the Nicobarese people, indigenous to the Nicobar Islands.

The Munda languages, spoken by various tribal communities in East India, belong to the Austroasiatic language family.

Manipuri, also known as Meitei, is a Tibeto-Burman language spoken in the state of Manipur and has close linguistic ties to Burmese.

Khasi is an Austroasiatic language spoken by the Khasi people, primarily in the state of Meghalaya.

Mizo, also known as Lushai, is a Tibeto-Burman language spoken by the Mizo people, primarily in the state of Mizoram.

The Naga languages, spoken by various Naga tribes in Northeast India, belong to the Sino-Tibetan language family.

Monpa is a Tibeto-Burman language spoken by the Monpa people, primarily in the state of Arunachal Pradesh.

The Kuki-Chin languages are spoken by various Kuki-Chin tribes, primarily in the northeastern states of India, such as Mizoram and Manipur.

Sikkimese, also known as Bhutia, is a Tibeto-Burman language spoken by the Bhutia people, primarily in the state of Sikkim.

Tangkhul Naga is a Tibeto-Burman language spoken by the Tangkhul Naga people, primarily in the state of Manipur.