Meaning of GLOSSOLILIA in English
or "speaking in tongues". In the first Centuries CE, it meant the ability of a person to communicate in a foreign language that they had never learned. e.g. a person raised speaking Greek and unable to speak any other language would suddenly be conversing in Aramaic. At the present time, it refers to a person who suddenly, in a state of religious ecstasy, starts speaking sounds that sound like language but do not represent any known tongue. The manifestation of glossolilia is an expected development in all Pentecostal believers and is a sign of the grace of God. It is also a common practice among charismatic Christians. More details are available.
English glossary of religious terms. Английский глоссарий религиозных терминов. 2012