What is a cultural region?

In anthropology and geography, a cultural region or cultural sphere refers to the aspects of culture associated with an ethnolinguistic group and the territory it inhabits. Specific cultures often do not limit their geographic coverage to the borders of a nation state or to smaller subdivisions of a state.
a region defined by its culture
A cultural region is an area in which a group of people share a similar culture and language.
A culture region is an area of the world with common characteristics such as history, language, and beliefs. A cultural region or cultural sphere refers to cultural aspects related to an ethnolinguistic group and its geographical territory.
areas that refer to a geographical area with one relatively homogeneous human activity or complex of activities