Bias
Fixed and preconceived ideas about the culture
Every outsider arrives carrying a suitcase full of preconceptions, and the most important skill is not to pretend the suitcase is empty.
Bias toward another culture often travels as knowledge: things 'everyone knows', impressions formed from media, tourism, a single encounter, or the stories of others. These impressions are not random. They reflect which parts of a culture are most visible to outsiders, which groups shape the narrative, and what role that culture plays in the imaginations of the people doing the observing. Stereotypes compress something complex into something manageable, and that compression always loses something critical.
The biases held about a culture are themselves cultural artefacts worth examining. Which country or people gets coded as 'exotic', 'cold', 'chaotic', 'traditional', or 'modern' tells you as much about the observer as about the observed. People who have lived across multiple cultures often describe a growing awareness of how differently they are perceived in each place, and how rarely those perceptions match how they experience themselves.