Third Culture Kids
Third culture kids (TCK) are people who were raised in a culture other than their parents' or the culture of their country of nationality, and also live in a different environment during a significant part of their child developmental years (1). Third culture kids: Citizens of everywhere and nowhere. They typically are exposed to a greater volume and variety of cultural influences than those who grow up in one particular cultural setting (2).
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Van Reken, Ruth E.; Pollock, David C.; Pollock, Michael V. (2017). Third Culture Kids: The Experience of Growing Up Among Worlds (3rd ed.). ISBN 978-1857884081.
Useem, Ruth Hill; Downie, Richard D. (1975-11-30). "Third-Culture Kids". Today's Education.