Ever wonder what R2-D2 was saying during the Star Wars movies? It turns out that he's a cross between Marvin the robot from Hitchhiker's Guide, Daria Morgendorffer, and George Carlin. Here are clips from The Phantom Menace in which R2's chittering is subtitled into English.
Content warning: hilariously foul language.
[Video Link] HT: Topless Robot
Also: Episode II, similarly subtitled.