Quote Originally Posted by Yaridovich View Post
Swear words.

Duh. :rolleyes2
lol, QFT.

Seriously though. There are the basics like Food, drinks, general expressions, and verbs and such. There are also some useful categories like clothing (although a bit boring for my tastes), body parts (to describe and whatnot), and colors are always good. There's a large variety to choose from. Good luck on whatever you decide to do.