性格不合in english

The phrase "性格不合" in English can be translated as "incompatible personalities" or "personality mismatch." It refers to a situation where two people have different or conflicting temperaments, attitudes, or behaviors that make it difficult for them to get along or maintain a harmonious relationship. For example, one might say, "They broke up because of incompatible personalities," to explain that the relationship ended due to differences in character or disposition.