Dreamspeak

This spell, also known as Detho's delirium, causes a creature to speak. The creature to be affected must be asleep, drunk, or unconscious (not feigning), and is allowed a saving throw at -2 to avoid the effect. Affected victims babble randomly in all languages they know. They cannot hear queries or be forced to speak about certain topics. Magical attempts to guide speech are 90% likely to break the spell. A victim talks ceaselessly; jokes, dreams, opinions, tales, and facts all pour out together. There is a 22% chance per round (not cumulative) that a name, password, direction, magical item command word, or other useful utterance will be made. Victims rarely identify such words— listeners must pay attention and guess.