Mr. Kupferberg

Mr. Kupferberg is a French teacher at Springfield Elementary School who can't speak French.

History
During Lisa's speech to the students, she said that they deserve a French teacher who actually speaks French. She then pointed at him and said "J'accuse, Monsieur Kupferberg.", which means "I accuse, Mr. Kupferberg." However, he didn't understand her and asked what she is yacking about.

Behind the Laughter

 * Lisa's words "J'accuse, Monsieur Kupferberg." are a reference to Emile Zola who wrote an open letter to the French president in 1898 about a political coverup.