A term that means belonging to or native to a particular people or country.

The answer is endemic

The term used to define a particular people belonging native region or country is Endemic.

Explanation:

Especially endemic is used to describe the native character in living organism. Those who live in certain jungle from their existence then those organisms are endemic species of that particular jingle.

Some living organisms are originated from a certain place and they are not found in any other part of world means they are endemic species.

For example: the mocking bird, are endemic to Galápagos Islands.