That's some novel eisegesis, but it has nothing to do with what Paul was saying. Nothing in the text hints that "tongues" is greater understanding that enables more accurate translations.
Neither did I say that.
Neither Acts 2 nor Acts 10 support that idea either. "They spoke as the Spirit gave them utterance", not "they translated as the Spirit gave them full understanding".
The speakers aren't the translators. Someone speaks in a foreign language and other person who knows that language is the one who translates it. The HS helps them translate more accurately than just someone who knows both languages. This is especially important when the translating is regarding biblical and spiritual matters.
If what you are claiming were true, then there would be no need for the manifestation of interpretation of tongues, which is distinct. Paul would not have written, "He who speaks in a tongue should pray, that he may interpret".
He he didn't know the l;anguage the people he was speaking to spoke, then he should pray to be able to speak their language to be able to translate but of course if he knew that other language he would have spoken in it and not his own language.
He also would not have written, "He who speaks in a tongue does not speak to men but to God, for no one understands." Further, it is unlikely that he would have written, "He who speaks in a tongue edifies himself".
You have misquoted the verse:
1Co_14:2 For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.
Obviously if you speak a language no one else knows you are only talking to God.
Paul would have nothing to do with "a faked supposed language".
Nor should anyone else yet it is common for this to be heard in some Churches. Paul addresses the faked language here:
1 Corinthians 14:7 And even things without life giving sound, whether pipe or harp, except they give a distinction in the sounds, how shall it be known what is piped or harped?
It is the same with a musical instrument. What good is playing one if it is randomly played with indistinct sounds? It is the same when you speak "in a tongue".
1 Corinthians 14:8 For if the trumpet give an uncertain sound, who shall prepare himself to the battle?
Certain trumpet sounds (short musical pieces) signified certain actions to be carried out. Have you ever heard a trumpet sound at the horse races that tells the racers to begin the race? What if the trumpet made a strange sound no one knew? It would be confusion.
1 Corinthians 14:9 So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air.
Do not utter "words" which are not easy to understand. If it is not easily understood by the listener then the speaker has done something wrong.
1 Corinthians 14:10 There are, it may be, so many kinds of voices in the world, and none of them is without signification.
1 Corinthians 14:11 Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me.
915
915 barbaros {bar'-bar-os}
of uncertain derivation; TDNT - 1:546,94; adj
AV - barbarian 5, barbarous 1; 6
1) one whose speech is rude, rough and harsh
2) one who speaks a foreign or strange language which is not
understood by another
3) used by the Greeks of any foreigner ignorant of the Greek
language, whether mental or moral, with the added notion after
the Persian war, of rudeness and brutality. The word is used
in the N.T. without the idea of reproachfulness.
Take note esepcially of the last two definitions as this is exactly what Paul is addressing.
Do not speak and sound like a barbarian. This means do not speak ignorantly, in a mumbo-jumbo, gibberish, non-sense, false, made up by YOU "tongue".