[He picks up the explination smoothly, having anticipated it. He's had to stumble through this one more than once, and has finally nailed it down.]

A droid is a machine built to look and act a little like a person. They're still obviously made of metal, though, and they aren't really alive. A Protocol Droid is specifically made to be useful in diplomatic situations, and they often serve in the place of translators. No living being can learn the number of languages a Droid can be programmed to use.