I have read about many people claiming to be able to speak in tongues. I’ve even talked to some who claim to be able to do this. When I pressed them about it, they said that are actually speaking a language, but that it is unintelligible. One person demonstrated it for me and it sounded like porcine squeels.
If anyone can “suddenly” speak an actual human language that they weren’t able to before, then I’ll believe that they have the gift of tongues since that would by definition be a miracle. Until then, I have no reason to think that claims of “speaking n tongues” is self-deceptive and make-believe gibberish. It may be well-intentioned, but it’s still wishful thinking. Unbiblical, too.
From the Acts of the Apostles, the gift of tongues was manifested in actual human, recognizable languages:
1 When the time for Pentecost was fulfilled, they were all in one place together.
And suddenly there came from the sky a noise like a strong driving wind, 2 and it filled the entire house in which they were.
Then there appeared to them tongues as of fire, 3 which parted and came to rest on each one of them.
And they were all filled with the holy Spirit and began to speak in different tongues, as the Spirit enabled them to proclaim.
Now there were devout Jews from every nation under heaven staying in Jerusalem.
At this sound, they gathered in a large crowd, but they were confused because each one heard them speaking in his own language.
They were astounded, and in amazement they asked, “Are not all these people who are speaking Galileans?
Then how does each of us hear them in his own native language?
We are Parthians, Medes, and Elamites, inhabitants of Mesopotamia, Judea and Cappadocia, Pontus and Asia,
Phrygia and Pamphylia, Egypt and the districts of Libya near Cyrene, as well as travelers from Rome,
both Jews and converts to Judaism, Cretans and Arabs, yet we hear them speaking in our own tongues of the mighty acts of God.”