This is a very specialized form of intuition. Whenever encountering something truly alien to the character, other cultures, first contact, a roomful of drunk Wookiees, whatever, the character may make a Perception check, difficulty set by the GM. If successful, the player recieves some hint as to what to do. They may not be the one able to do it, but they can communicate this to whoever can. In situations where nobody has the appropriate skill, such as communicating to a previously undiscovered alien species, they can still get some idea with a successful check. In such a case they only get the most basic idea since they don't know the alien's language.