Curse of Verbosity

The target must make a wisdom saving throw.  If they fail, they must make a constitution saving throw the first time they speak per turn.  If they fail the constitution saving throw, they say something drastically different than intended until the start of their next turn.  If they were attempting to cast a spell with verbal components, they would lose the spell.

This spell can only be dispelled by a  remove curse cast on the target.

If you cast this spell using a spell slot of 4th level or higher, the duration is concentration, up to 10 minutes. If you use a spell slot of 5th level or higher, the duration is 8 hours and doesn’t require concentration.  If you use a spell slot of 7th level or higher, the duration is 24 hours. If you use a 9th level spell slot, the spell lasts until it is dispelled.