It appears that either in U18 or U18 patch 1 somebody left a debug switch on.
In all three King's Forest flagging quests (just the first three) I have had NPCs (Ana, Zombies, miscellaneous other mobs) say "Setting to stop squirming at Node 2" or "Setting to backup at Node 4".
The text appears both in general chat and above the NPC's head, in the NPC's 'name color'
I am pretty sure that these are both debug code items to show AI script executing, and that the code lines just had their removal (or 'commenting out') missed.
It was funny the first couple of times, but it appears to be in all the first three King's Forest quests. I don't think I saw it in the Battle for Eveningstar quest tho.
(I tried to bug report it in-game, but that is "currently unavailable")