Star Wars is a saga with as many languages as weird alien races, but most of them are able to speak Galactic Basic, which makes movies and voiceovers in The Old Republic much less reliant on subtitles. While Basic may be the most common language in the galaxy, it stands to reason that our characters, especially non-human ones, might know others too, including the nearly as common Huttese.
Anyone who has ever learned a foreign language with a friend or watched a corny movie about twins knows that sometimes a secret language can be used for all sorts of fun and mischief. In roleplay though, it can have uses as well. Imagine the possibilities of being able to secretly communicate with allies during intense negotiations, or tip off your friends to an ambush quietly. Smugglers in Star Wars even invented their own language of sorts called Deal-slang. In Star Wars Galaxies, Twi'leks could use lekku language conveyed through slight bodily movements to converse with each other.
Our question for you today is what use would your character have for such systems? Are Imperial Agents developing their own language to thwart Republic counter-intelligence? Will Smugglers in TOR be using Deal-slang? Let us know what you think and even what other languages you have used or come up with to add some spice and secrecy to your roleplay!