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What were the languages of the Naga people?
Naga people speak over 89 different languages and dialects, mostly unintelligible with each other.
However, there are many similarities.
Do they have any language in common?
Per Grierson's classification system, Naga languages can be grouped into Western, Central and Eastern Naga groups.
Who makes the Western Nasa groups?
The Western group includes among others Angami, Chokri, Khezha and Rengma.

Question: Who makes the central naga groups?
Self-contained rewrite: Who made the central Naga group?