Glossolalia

You scramble the ability of the target to use language, causing them to speak in unintelligible tongues.

Critical Success The creature is unaffected.

Success For 1 round, the target's language becomes unintelligible, they're unable to communicate ideas with other creatures, and any action they take with the linguistic trait fails.

Failure As success, and the target can't cast spells that require incantations for the duration. Spells with the subtle trait don't require incantations.

Critical Failure As failure, except the duration is 1 minute.