It is said that whatever God can create, Satan can counterfeit. And the gift of tongue is the one gift that can be easily counterfeited. We cannot communicate biblical truth through meaningless sound. A language without a meaning is pointless. It is the meaning that makes a language to be a language. To be sure, when the apostles spoke in tongues in the day of Pentecost
(found in Acts 2), they spoke languages and not gibberish. To be sure, the apostles did not all understand what they themselves were saying, but the millions of foreigners who were gathered together on that day from all over the world (and did not understand Hebrew or Aramaic) understood exactly what the apostles were saying. The apostles were preaching the gospel of Jesus Christ, proclaiming the resurrection in these foreign languages, so that these foreigners would take the gospel back to their homeland and preach it and proclaim it. That gift of language was given by the Holy Spirit of God so that the gospel may spread through these millions of visitors by them taking the gospel they’ve heard back to their countries. Anyway, I have written on this subject, so please do feel free to read my blog to understand more of my take.
Greater is the Gift of Prophesying