Language difficulties are always fun to roleplay.

Well, for the GM, anyway.

Transcript

R2-D2: Hey! You're not going to leave me with these lowlife dreadnought-larcenists, are you?
GM: Pete, that's in character. You know what you have to do.
[SFX]: < boop squee boo-diki e-doosquee doop bi-fidooby bloop bading bebebing kibuzz >
Adam: What are you doing?
C-3PO: He's an astromech droid. He can only talk in beeps.
Adam: Ha ha! Now that's funny.
R2-D2: Funny? I suppose you think my +3 hypogalvanic shock probe is funny?
{beat}
R2-D2: Threepio, translate for me!
{R2 bounces around in an agitated fashion}
[SFX]: < doop buzz kap spip prowww squee ooyoo >
C-3PO: Oh dear, the R2 unit is babbling about his shock probe!
Jawa: Shock probe? He's trying to escape!
[SFX]: ZAP!
Jawa: What we've got here is... failure to communicate.