/ˈliːɡəl ˈkʌstəm/ – Phrase
Definition: tập quán pháp lý.
A more thorough explanation: Legal custom refers to a practice or behavior that has been consistently followed and accepted within a particular community or society, and which is recognized as having legal significance. Customary law is a source of law that is derived from the traditional practices and customs of a community, and is considered binding and enforceable within that community’s legal system.
Example: The legal custom of primogeniture, where the eldest son inherits the family estate, was common in many European societies for centuries.