In Spanish, “behave yourself” is commonly translated as “portate bien”.
This phrase is often used to ask someone to be on their best behavior or to act appropriately, especially in social settings or situations that require decorum. The verb “portarse” means to behave, and “bien” means well. So, when you tell someone to “portate bien,” you are essentially telling them to conduct themselves properly.
It’s worth noting that this phrase is often used in a friendly, sometimes parental tone, especially when speaking to children. For example, a parent might say, “Por favor, ¡portate bien en la fiesta!” which translates to “Please, behave yourself at the party!”