Sedivore: The Untittled
Linguistics is the skill to figure out languages you do not know. The ones you know are the covered by the languages skill. This skill handles you reading or hearing a language you do not know and identifying it and possibly working out meaning based on its relation to languages you do know and other things. For instance it might be able to tell you that something is written in the language of a tribe that had powerful healing magics and based on a few words that are related to them from the languages you know you can pick out that this is the lost spell of resurrection you were looking for as opposed to just a page from someone’s diary or a recipe for grandma’s famous stone soup.