GURPS Horror 78 gives some exceptions:
- Even ghosts with Cannot Speak can often utter a single,
programmed phrase (“Get out!” or “Evangeline”), sing a tuneless children’s song, or otherwise unhelpfully allude to their trauma.
GURPS Zombies 69 also:
- This is fair for zombies that can vocalize well enough to convey basic information (“Moan once for ‘yes’ or twice for ‘no.’”) – Cannot Speak allows verbal communication, just not spoken language.