"Speaking in tongues," also known as glossolalia, is a practice often associated with Pentecostal and Charismatic Christian movements. It involves individuals vocalizing sounds or languages that are not understood by the speaker or the listeners. This phenomenon is believed to be a spiritual gift, allowing believers to communicate with God or express their faith in a profound way. The practice is mentioned in the New Testament, particularly in the book of Acts and 1 Corinthians. While some view it as a sign of spiritual empowerment, others see it as a form of emotional expression. Interpretations and acceptance of speaking in tongues vary widely among different Christian denominations.