Okay if you want to talk to specific NPCs or about specific things. Then going to the mods is the way to go to see what sort of responses you can get.

However, we also assume that anything that can be found out in the real life games or anime and so on is fair information in route, so if you're looking for a way to have your character informed of something that is known ooc, you are free to make it up.

This is what I go from the mods on the matter. I hope it helps.