Look at this passage from I Corinthians 14
18 I thank my God, I speak with tongues more than ye all:
19 Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.
If Paul knew Aramaic, and praying in Aramaic were 'speaking with tongues' in verse 18, since he knew the language, he would be using his 'understanding' to pray in it. But in verse 19, he contrasts praying with his understanding with speaking in tongues. The implication is that when he prays in tongues, he is not using his understanding, his 'noi'-- his mind, understanding, reason. If he spoke in tongues, he would not be using his reason or mind. What language would Paul speak in that he did not know? If he were to use a Hebrew, Aramaic, or Greek liturgy, it is highly unlikely that there was one of those languages that he did not know. How would he be able to speak in a language he did not know?
That is the question. When Paul spoke in tongues, how was it possible for him to do so without knowing it, without using his mind to do so?
Do you see how the idea that the speaker does not understand the tongue comes from direct exegesis.
I wonder why the interpretation you propose appeals to you, and also the diglossia interpretation of Acts. To me, this seems like grasping at straws to find a non-supernatural explanation to events in a book filled with the supernatural. It reminds me of liberal scholars trying to argue that there was a tidak wave or earthquake that caused the Red Sea to be knee deep for the Exodus, or the (joke) liberal theory that Elijah poured lighter fluid on the sacrifice at Mt. Carmel, and had a match behind his back
It's not Peter or Paul who are credited with the speaking the new languages other than Hebrew as sign against those who will not hear prophecy in any language .
Even before that when God spoke in Hebrew prophecy is not accredited to them
Paul being in more places where the Spirit of God was moved to prophecy the hearing in other languages a larger missionary field .He gave his desire he would rather speak five words with my understanding, that by my voice I might teach others also
I thank my God, I speak with tongues more than ye all: Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue.1 Corinthians 14:18 -19
Tongues are prophecy spoken in many languages .God is no longer bringing any new prophecy in any manner to include tongues . We have the perfect. Why go above that which is written.
Tongues the fact God was mocking the Jews that mocked Him is still in effect The unbeleiveing Jew is still hoping that God is only speaking in Hebrew.