Bird Common is now a language of this world. This is a thing.

On the note of languages we have...

Northwest Common, West common, East Common, Southeast Common and North East common. All of them are comparable with each other but there as different from each other as Southern American English to London British English. So its like really stretching for someone in Navire to carry a conversation with someone in the far north east (hint hint) but that's something well each get to have fun with. (Like asking, "what? Speak more slowly please.") 

Specific languages that are different are per kingdom with only remote kingdoms having no common language. Such examples would have a long history of isolation with the world. Youll get to see some fun with patron blessings and languages pretty quick. 

So anyone want to elaborate on kingdom specific languages if they can fit it into their history?