This YouTube clip is of a scene from “A Night at the Opera” with The Marx Brothers. To simulate a foreign language, lines of dialogue that were meant to sound foreign were reversed when the film was originally made. That is, the foreign language is just English played backwards.

It’s not too spectacular, in fact it’s just an honest translation of what the other characters asked him to say but here is the audio I reversed: A Night at the Opera Reversed.

(via)