It is my firm conviction, based on the Scriptures, that the gift of “tongues” from Acts 2 is speaking a previously unknown language. It came to authenticate the apostles before Scripture was written and served as a sign to the Jews that judgment was upon the nation. We see tongues spoken only two other times in Acts when the Gospel reached the concentric spheres mentioned in 1:8 and then it ended in Acts 19 when the Gospel reached the so-called “remotest part of the earth” (cf. Ac. 2:4; 8:17; 10:46 and 19:6).