Rusty Griswold: Oink oink, my good man.
Clark Griswold: There's Buckingham Palace, kids. That's where the Queen lives and works.
Audrey Griswold: Works? What does she do, Dad?
Clark Griswold: She queens... and vacuums.
Rusty Griswold: Who was it that said when in Rome do as the Romans do?
Clark Griswold: That was Rome not Paris. This is Paris and you're drunk.
Answer: The answer could be any of those suggestions. It could also very well be a movie mistake. It's not uncommon for character names to be misspelled, either on some document or in the cast credits.
raywest ★