A New York magazine recently ran a contest for people with silver
tongues and a command of foreign languages. The rules were to take
any well-known phrase in a foreign language, change just a single
letter, and then provide a definition for the new expression.
Here are some of the winners: 

HARLEZ VOUS FRANCAIS?: Can you drive a French motorcycle?

IDIOS AMIGOS: We're wild and crazy guys.

COGITO, EGGO SUM: I think. Therefore, I am a waffle.

RIGOR MORRIS: The cat is dead.

REPONDEZ S'IL VOUS PLAID: Honk if you are Scottish.

QUE SERA SERF: Life is feudal.

LE ROI EST MORT. JIVE LE ROI: The king is dead. No kidding.

POSH MORTEM: Death styles of the rich and famous.

VENI, VIPI, VICI: I came. I am a very important person. I conquered.

PRO BOZO PUBLICO: Support your local clown.

MONAGE A TROIS: I am three years old.

FELIX NAVIDAD: Our cat has a boat.

HASTE CUISINE: Fast French food.

VENI, VIDI, VICE: I came, I saw, I partied.

QUIP PRO QUO: A fast retort.

ALOHA OY: Love, greetings and farewell from such a pain you should never know.

MAZEL TON: Tons of good luck.

APRES MOE LE DELUGE: Curly and Larry got wet.

PORTE-KOCHERE: Sacramental wine.

ICH LIBERICH: I'm really crazy about having dough.

FUI GENERIS: What's mine is mine.

EX POST FUCTO: Lost in the mail

VISA LA FRANCE: Don't leave your chateau without it.

CA VA SANS DIRT: And that's not gossip.

BUN JOUR: The daily special at the bakery.

BAN JOUR: The daily special of the League of Decency.

BEN JOUR: Charlton Heston's cousin.

BIN JOUR: A special at the thrift shop.

BONE JOUR: A special at the meat market.