Respondez s'il vous is French for....

R.S.V.P. and according to the handbook " As a Gentleman would say," written by John Bridges and Bryan Curtis: "When a gentleman has neglected to respond to a party invitation that was market R.S.V.P ("Please reply " in French)...he does say: "Mary Jane I hope you'll forgive me for calling so late. I do hope you'll still have room for me at your party."" And ladies and gentlemen if you were not invited realize YOU WERE NOT INVITED. Is it that hard to understand?