The episode's title is a play on John Steinbeck's novel The Grapes of Wrath (the movie that is based on the novel, is, like The Simpsons, a Fox property).
This is the last episode of Season 1 to be produced
When Cesar and Ugolin are taken away by the police, the name on the side of the police van is in English, despite the fact that the scene takes place in France.
Early in the episode, there is some actual dialogue in Albanian between Adil and his family, but later on the dialogue is just gibberish. The dialogue in French is very loosely translated, but correct.
Ugolin whistles the melody of "Alouette" while walking to the fields, but the song, which originates in French-Canada, is not very well known in France and would likely not be known by someone of his class standing.
In later seasons, Agnes Skinner's personality seems vastly different to her kindly demeanor in this episode. In the DVD audio commentary, Matt Groening offers the theory that her current mean streak can be attributed to being a victim of Bart's prank.
Cesar and Ugolin appear 17 years later in The Simpsons Game, in the episode (level) Medal of Homer. During the gameplay, they are your enemies, but in the ending cutscene, they are your allies, because you have protected France. As a reward, they give you a Royal French Painting with a Flying Hellfish logo. It is a mystery why do they not remember Bart Simpson, or plan to take revenge on him - However, as this section of the game takes place during World War II, it's probably due to the fact that, technically, Bart wasn't even born yet.
One of the deleted scenes.
In an original commercial for the episode, two scenes in it are not featured in the episode, one where Bart woos some French dancers, and one where Bart stuffs chocolates into his mouth.
