Back in the day, before the PC craze, we told "Polish jokes" (in America).
I was told (and I have no other reason to believe otherwise) that the French told "Belgian joke". I am sure that the Belgians told "Luxembourgoise jokes".
Anyway, one that I had never heard, that I fell in love with was about the Belgian who went to France to seek his fortune...
He look all over for work and no one would take him, they all through Belgians were fools.
Down and out, he tried one more time to get a job at a garage. The garage owner took pity on him and agreed to take him on.
The owner asked him to do an engine tune-up, but the Belgian said he couldn't sing.
The owner asked him to do a brake job, and the Belgian broke everything on the car.
Finally, in desperation, the owner put him working with one of him men on the simplest job they could find -- he would do car inspections. After three attempts ("yep, that looks like a car to me")
, he was demoted to car inspection assistant.
"First, we're going to check the lights."
"How do we do that."
"Simple. I'll call out which light I'm going to turn on, you tell me if they work."
They walked around the car and the inspector pointed all of the lights out. "These are the head lights, high beam, low beam. These are the parking lights, front and back. Here are the brake lights, and these are the turn signals."
The inspector turned on the head lights and called out "Headlights!"
The Belgian says "OK, they work."
"Parking lights!"
"OH, ok... yes, yes, yes, yes. They work!"
"Brake lights!"
"Yes. They work!"
"Left turn signal!"
"Ok, it works. No, wait, it's out. Oh, it's working. No wait, it's off again..."
:-D