A'Tong is a language

Language

Language may refer either to the specifically human capacity for acquiring and using complex systems of communication, or to a specific instance of such a system of complex communication...

 of the Sino-Tibetan family, related to Koch

Koch (language)

Koch is a Tibeto-Burman language spoken by the Koch people of both the Republic of India and Bangladesh.-External links:* *...

 and Rabha

Rabha

Rabha is a little known Scheduled Tribe community of West Bengal and Assam. The language/dialect spoken by the Rabha people is also of the same name. In West Bengal, Rabha people mainly live in Jalpaiguri district and Cooch Behar district. Moreover, almost, 70 per cent of them live in...

. It is spoken in the Southern Meghalaya

Meghalaya

Meghalaya is a state in north-eastern India. The word "Meghalaya" literally means the Abode of Clouds in Sanskrit and other Indic languages. Meghalaya is a hilly strip in the eastern part of the country about 300 km long and 100 km wide, with a total area of about 8,700 sq mi . The...

 (South Garo Hills, Hd. Qtr.-Baghmara) region of India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

.

No current estimate of the number of speakers is available; according to the Linguistic Survey of India it was spoken by approximately 15,000 people in the 1920s.