[@Dark Cloud] I'd say simple writing at the most, but verbally it can be whatever you want. It would really hamper writing psots if we had to ooga booga, but if you want to make it simple in writing too then you are welcome haha.

As for culture, I imagine this is mostly the part where we don't quite have any way to preserve stuff and as such culture is mostly passed down instead of embed in books, statues or buildings. So it can be anything you feel like your people have managed to keep with themselves for generations. Simple religious or customary stuff I suppose, kinda like rezay did it :)