In the library in the Castle of Arx, Sister Chinkashh (the snake woman) speaks to herself. Some of these lines are in the Lizardman tongue from Ultima Underworld, which this game was meant to be a sequel to.

An example of this would be (I think)

"Isili thesh yeshor`click Shaegaar" (I like friend Shaegar).

Doesn't really explain why she turns on him though, unless the line was "Isili yethe hor`click Shaegar" (I kill stranger Shargar).