Final answer:
The term for generalizations about another culture that are not true is 'stereotype'. Such generalizations can be an example of ethnocentrism, judging another culture by one's own norms.
Step-by-step explanation:
The term used to describe generalizations about customs or traditions of another culture that are not true is a stereotype. A stereotype is an oversimplified or generalized belief about a group of people that doesn't accurately reflect reality. It's important to differentiate between general factual descriptions of cultural tendencies and stereotypes, which can be harmful and misleading. Basing judgments or assumptions on stereotypes exhibits a form of ethnocentrism, which is evaluating another culture using one's own cultural norms as the standard and often leads to misunderstanding and conflict. Relativism is an alternative approach that recognizes the diversity of cultural practices without immediately judging them against one's own cultural standards. It is vital to avoid stereotypes and practice cultural relativism to understand the complexity and diversity of human cultures.