Formal:
* Multicultural: Emphasizes the person's exposure to multiple cultures.
* Multiethnic: Highlights the person's heritage from different ethnic groups.
* International: Focuses on the person's global connections and experiences.
* Cosmopolitan: Suggests a sophisticated understanding of different cultures and ways of life.
Informal:
* Citizen of the world: A poetic way to describe someone who feels at home in many places.
* Global citizen: Emphasizes the person's connection to the world as a whole.
* Hybrid: A simple and modern term that acknowledges the person's mixed heritage.
The best term to use depends on the specific context and the message you want to communicate.