As one travels across different parts of the known world (or universe, as the case may be), one encounters different accents and ways of speaking, even when the language is ostensibly the same. This is usually ignored for simplicity within a game context, but if you have a linguistic bent you can make great use of it to add flavour to your world. It can serve both to slightly confuse and also to provide clues for the observant adventurer.

The thieves' cant in the city of Rivendeep uses an unusual lisping sound, which instantly marks any thief as originating from that city, wherever they may travel across the continent. And if you happen to run into another who uses the same sounds elsewhere, an instant bond of camaraderie and mutual assistance is formed.

Transcript

R2-D2: {yellow GM speech bubble} Never mind. Shock plobe then.
[SFX]: Pow! {Leia and Chewie are in a shoot-out with troopers}
R2-D2: Guys, I'm okay, really! Don't leave me behind!
[SFX]: < bedoing doop bippity boop ting whirdle >
[SFX]: Pow!
PA System: It's time.
R2-D2: {yellow GM speech bubble} If onry there was a rarge power source in this stupid can...
C-3PO: Artoo! Pull yourself apart!
R2-D2: Leave now, and never come back!
[SFX]: < ting whirdle bip zizz dip-fidooby >
R2-D2: Leave! Now! And never come back!
[SFX]: < ting whirdle bip zizz dip-fidooby >
[SFX]: zzt.. zzzt...!
R2-D2: He's gone! I'm free! I have control back!
[SFX]: < doing ting doop whirdle-ting doop zizang >
[SFX]: Pow!
PA System: Yes we can.
Leia: Prove it.
R2-D2: Clawed crows crave crusty clams cleverly crammed in clean cream... receptacles.
[SFX]: < ding-whiree paniding whir nibibuzz boodit-kading bwoop bezibuzz beepop po-fipgi pobuzz >
{beat}
[SFX]: Pow!
[SFX]: Pow!
Chewbacca: So, was that actually right?