"Mr Goldberg From Pinsk" joke

Mr Goldberg, from Pinsk, coming to America, shared a table in the ship's dining room with a Frenchman. Mr Goldberg could speak neither French nor English; the Frenchman could speak neither Russian nor Yiddish.

The first day out, the Frenchman approached the table, bowed and said, "Bon appétit!"
Goldberg, puzzled for a moment, bowed back and replied "Goldberg."

Every day, at every meal, the same routine occured.

On the fifth day, another passenger took Goldberg aside. "Listen, the Frenchman isn't telling you his name. He's saying' Good Appetite,' that's what' Bon appétit!' means."

At the next meal, Mr Goldberg, beaming, bowed to the Frenchman and said, "Bon appétit!".
And the Frenchman, beaming, replied: "Goldberg!"