Previous research on cultural adaptation has focused on the challenges and outcomes associated with long-term adaptation to a foreign culture. Little has focused on the dynamics of cultural adaptation within single interactions, which are the building blocks of these long-term patterns. I fill this gap by introducing the concept of cross-cultural code-switching and providing an account of the psychological chal- lenges people face in successfully adapting their behavior in foreign cultural inter- actions. A critical practical challenge that organiza- tions face in the increasingly interdependent global economy is the ability to function effec- tively across national cultural boundaries. In- stead of operating exclusively within the cul- tural setting in which they were born and raised, individuals must now be capable of functioning appropriately in a wide variety of foreign cul- tural situations, many of which have different cultural norms for appropriate behavior that may conflict with their core values and beliefs. In response to this challenge, a growing number of management scholars have examined the antecedents and consequences of successful long-term adaptation to a foreign culture. Re- searchers have identified the interpersonal, intrapersonal, and technical skills required for long-term expatriate success (Black & Gre- gersen, 1999; Black, Mendenhall, & Oddou,