/ˈkɒmən lɔː spaʊs/ – Phrase
Definition: Người yêu cũng sống chung như vợ chồng theo pháp luật.
A more thorough explanation: a manwoman who is not officially a husbandwife but is considered to be one in some countries because heshe has been living with their partner for a long time
Example: The family lawyer was instructed to advise on the legal status of a common-law spouse.