Sparks, I have a little question/suggestion: Would it be an idea if the merchants (at least those on one side of the continent) have formed a sort of "common language"? It'd be a practical, easy to learn language, which is however not too widespread. It's just for the sake of making it easier to trade/communicate with one another, though besides merchants there wouldn't be many who speak it. It'd be a lot like
Esperanto. Since it won't really be used on diplomatic mission, "translator" is sitll a profession and of course it never hurts to learn the language of your trading partners ^_^' (to make sure that you know what they're talking about when they think you can't understand what they're saying lol).
I'm not all too sure if this will be all that useful in the rp itself (unless someone decides to create a merchant/someone with a history as a trader), it's more a thing I thought of for the sake of realism.