Abstract:In Christian traditions of “speaking in tongues,” glossolalia refers to an explicitly linguistic form of involvement with the deity, one carried out through denotationally unintelligible behavior. Its religious legitimacy depends on its being speech and not merely speech-like. South Korean Christians practice glossolalia widely across denominations, commonly in cacophonous settings of group prayer. Combined, glossolalia and cacophony impose limits on “normal” linguistic functions while reinforcing ideological commitments to language itself. Glossolalia should be conceptualized as cultural semiosis that is said to contain, and can therefore be justified by, an ideological core of language, but that is in fact produced at the ideological limits of language. This dynamic shapes how practitioners discern the nature of communication with their deity and with one another.