I'm going the assume that everyone speaks Taldane (common) and their regional tongue (Polyglot for Tgamo, Skald for Nestor, etc) plus whatever they pick up with Intelligence or Linguistics. Taldane is frequent enough given Wati's position as a holy city and the new boom in trade and travelers that it still counts as "common" - it's like speaking English in Paris, most people are going to at least be able to give you directions.<br/><br/>Out of human languages, the AP only worries Taldane, Kelish, Osiriani, and Ancient Osiriani.<br/><br/>Speaking of the two Osiris languages, it's possible to decipher ancient Osiriani with a DC20 linguistics check, if you know Osiriani - it's DC30 to interpret heiroglyphics if you don't. and of course if you already know Ancient Osiriani, that makes it easier.