...Karparthy? That dreadful Hungarian? Was he there?

I happened to see My Fair Lady on Broadway in March 1957, and the Hungarian Revolution had just occurred, and been quashed. For that nonce one line was changed: "Hungarian" became "Bulgarian", and in the song that followed Budapest (home of That Hairy Hound) moved a few miles and was called Bucharest.

Didn't rhyme nearly as well with "ruder pest" but greater considerations ruled.