Duck Soup (1933)

His aid tells Sylvanian Ambassador Trentino, “I know it you idiot.” Spy Pinky never says a word. (0:13)

Spy Chicolini tells Pinky, “You no say-a nothing. What’s-a matter you no speak?... You act-a crazy.” (0:20)

Rich widow Gloria tells Rufus by telephone, “I can’t sleep.” (0:42)

Gloria asks Pinky, now disguised as Freedonia leader Rufus, “Have you lost your voice?” (0:44)

Rufus sees his reflection, or is it his double? Doppelganger? (0:46)

Rufus tells the court, “Gentlemen, Chicolini here may talk like and idiot and look like an idiot, but don’t let that fool you. He really is an idiot.”
”I wanted to get a writ of habeas corpus, but I should have gotten a writ of you instead.” (0:51)

Reference in Hannah and Her Sisters