Yes, It's in episode I. With that said Anakin is all of what 6 when he says it.
In episode II he calls it a light saber.
Anakin: When I got to them we got into aggressive negotiations.
Padme: Aggressive negotiations? What's that?
Anakin: Ah, well, it's negotiations with a lightsaber.
With that example does that mean that people who don't know what they are talking about call it a laser sword, and people who do call it a light saber?