One fun thing you can do with a fantasy world is invent new curse words, so you can vent steam appropriately in character without using actual vulgarisms. It's a time-honoured tradition, and it's also as fun as praff.
GM: The last droid hops over on to Anakin's ship.
Anakin: Get him, R2!
R2-D2: I use my shock probe.
R2-D2: Take that, you slimy sonofa—
[SFX]: < bebloop beedle doing babedoop doot nip-jing poppity fidooby bip doop kipoppity bzzt prowwww whroop boop bewhroop boop besquee boop beboppity squee diki-eeroo doop bzzt pop whroop doop diki-bzzt boodle ding >
Anakin: Wow. I almost regret leaving the translator off for that.
[SFX]: < fip-jing doot bippity >