adoptive father/son

In French, 'père adoptif' refers to a man who has legally taken on the responsibilities of a father for a child who is not his biological son, whereas 'fils adoptif' describes a boy or man who has been legally adopted and is therefore considered the son of the adoptive father. This relationship can hold significant emotional and legal implications, much like in English, and it is commonly used in discussions about family dynamics and legal guardianship.