NpcChitChat prints text from NPC speech bubbles into "NPC Yell" chat channel.
Not everything NPCs say goes into "NPC Say" channel by default. With this addon you won't miss a word from environmental chit-chat, or from quest-related bubbles popping while you are busy demolishing that environment. It's better to set up a separate tab for "NPC Yell", so you won't get overwhelmed with wisdom from guards' one-liners.