Rangers and teefy-sorts have sign languages- though the latter has to actually be taught and isn't really noticable by those not of the shadowy brotherhood. And bards have a special written language in their scrolls at least. I can't say anything about the other guilds.
Ryeka
Sometimes the key to happiness is not assuming it is locked in the first place- Ziggy
A journey of a thousand SMILES begins with a single step- Ziggy