Glossolalia
Glossolalia can be described as a state of mind in which a person finds themselves speaking and/or thinking in nonsensical gibberish which is structured in a manner that makes it sound as if it is a genuine language. This is often defined by linguists as a fluid vocalizing of speech-like syllables that lack any readily comprehended meaning.
During the experience of this effect, the person who is speaking in glossolalia will often be completely unaware that they are speaking in anything but their native language. This can potentially result in confusion and frustration as they struggle to process why the people around cannot understand what they are saying.
Glossolalia is often accompanied by other coinciding effects such as language suppression and delirium. It is most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, deliriants and dissociatives.