Nagamese Creole is a creole based on Assamese, Hindi, English and Naga languages. It is spoken by about 300,000 people and used in Nagaland, a small state in the north east of India. Nagamese is used as a lingua franca in schools, markets, hospitals, the legislative assembly and churches by the peoples of Nagaland, who speak more than 20 other mutually unintelligible languages. Nagamese stablised as a creole in about 1936.
source
wikipedia.org,
omniglot.com &
ethnologue.com