Neutral:
* Assimilation: This is the process of adapting to the customs, language, and values of a different culture.
* Cultural adaptation: This refers to the process of adjusting to a new culture.
* Acculturation: This focuses on the changes that occur when two cultures come into contact with each other.
More specific:
* Americanization: This specifically refers to the process of adopting American customs and values.
* Learning American culture: This is a general term that can encompass various aspects of American culture.
* Adopting American norms: This emphasizes the act of taking on the typical behaviors and expectations of American society.
* Socialization: This refers to the process of learning the rules and expectations of a society, including cultural norms.
More nuanced:
* Adopting American fashion: This focuses on the aspect of clothing choices.
* Learning American English: This emphasizes the language aspect.
* Conforming to American social expectations: This highlights the act of fitting in with American social norms.
The most appropriate term will depend on the specific context and the purpose of the learning process.
It's important to remember that "American" is a broad term, and there are many different subcultures and ways of life within the United States. The specific meaning of "dressing and speaking act like other Americans" will vary depending on the individual and their community.