Tongues are a sign to those who believe not - What does it show them? If done correctly (v27,28) and not all at once (v23,24) - it shows them that the Spirit of God and the Spirit of Christ dwell in a believer via the gift of holy spirit.
There are it, it may be, so many kinds of voices in the world, and none of them is without signification. Therefore if I know not the meaning of the voice, I shall be unto him that speaks a barbarian, and he that speaks shall be a barbarian unto me. So you, forasmuch as you are zealous of spiritual things seek that you may excel to the edifying of the church. Wherefore let him that speaks in a tongue pray that he may interpret. 1 Cor. 14:10-12 . . . .
bolded is the whole point of the previous verses.
No such thing as a sign gift we walk by faith not be sight (signs)
It shows that the unbeliever does not believe prophecy(Gods word) . So God mocking them spoke in any language he desired. I don't think the principle changes between verse 23,24 and v27,28)
He is simply stating that when the gospel goes out the other person must be able to understand interpret what they are saying to each other. Or they will both be as Barbarians to each other. The gift is mutual affecting two, never one as in self edification.. The gospel when delivered to a person that speaks another language would be like for instance with Philip and the Ethiopian, or Peter and the Italian who was sent to Peter.
Today they have machines that translate one language from the other.
When and if God did translate one language from another he does not each time say they both needed to hear the interpretation from God in their own language. Paul visited many places. This is before God no longer brought any new revelation after any manner. them hearing what the spirit says to each other . No private interpretation of men
Today we have the perfect word with no laws missing by which we could know our God more adequately. Many today claim they have received new revelations that add to the word of God. Paul must have had many experiences of the new workings of the Holy Spirit
The revealing of God in different languages could have been used many times. But once is enough to know men were not barbarians to one another and the gospel went understood by the Spirit of Christ that lived in them.
Simon needed to hear the gospel in his language from Phipps just as did Peter when God sent the apostle Cornelius who most likely spoke Italian
Acts 8:11-13 King James Version (KJV) And to him they had regard, because that of long time he had bewitched them with sorceries.But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.
Then Simon himself believed also: and when he was baptized, he continued with Philip, and wondered, beholding the miracles and signs which were done.
Acts 11:1-16 King James Version (KJV) And the apostles and brethren that were in Judaea heard that the Gentiles had also received the word of God.And when Peter was come up to Jerusalem, they that were of the circumcision contended with him, Saying, Thou wentest in to men uncircumcised, and didst eat with them. But Peter rehearsed the matter from the beginning, and expounded it by order unto them, saying, I was in the city of Joppa praying: and in a trance I saw a vision, A certain vessel descend, as it had been a great sheet, let down from heaven by four corners; and it came even to me: Upon the which when I had fastened mine eyes, I considered, and saw fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air. And I heard a voice saying unto me, Arise, Peter; slay and eat. But I said, Not so, Lord: for nothing common or unclean hath at any time entered into my mouth. But the voice answered me again from heaven, What God hath cleansed, that call not thou common. And this was done three times: and all were drawn up again into heaven. And, behold, immediately there were three men already come unto the house where I was, sent from Caesarea unto me. And the Spirit bade me go with them, nothing doubting. Moreover these six brethren accompanied me, and we entered into the man's house: And he shewed us how he had seen an angel in his house, which stood and said unto him, Send men to Joppa, and call for Simon, whose surname is Peter; Who shall tell thee words, whereby thou and all thy house shall be saved.
And as I began to speak, the
Holy Ghost fell on them, as on us at the beginning.then remembered I the word of the Lord, how that he said, John indeed baptized with water; but ye shall be baptized with the Holy Ghost.16