What is the process called when an individual or group adopts the cultural traits of a dominant group?

The process of adopting the cultural traits of a dominant group is known as assimilation. This occurs when individuals or groups gradually adopt the customs, values, and behaviors of another culture, often resulting in the loss of their original cultural identity. Assimilation typically involves a shift in language, social practices, and other cultural aspects to better align with the dominant group's norms.

In contrast, acculturation refers to the process where one culture comes in contact with another and adopts some of its traits while maintaining aspects of its original culture. Integration involves a blending of cultures where diverse cultural groups coexist and maintain their distinct identities. Cultural appropriation describes the act of taking or borrowing elements from one culture, often without understanding or respecting the original context, usually in a way that can be exploitative. These distinctions clarify why assimilation is the most accurate term for the process described in the question.