There is a few words in Glasslands and Thursday War if I remember right. Here is a small list that I found on Halopedia. Unggoy - Grunt Kig-Yar - Jackal Sangheili - Elite Yanme'e - Drone Jiralhanae - Brute Lekgolo - Hunter San' Shyuum - Prophet Huragok - Engineer Wort - Go Kaidon - Clan leader Nishum - Intestinal parasite or tapeworm