However, in Spanish, you would use:
* "Confirme su asistencia" (Confirm your attendance)
* "Por favor, confirme su asistencia" (Please confirm your attendance)
* "R.S.V.P." (The French acronym is often used in Spanish as well)
So, when you see RSVP on a Spanish invitation, it means the same thing as in English: they want you to let them know if you'll be attending.