Third, I think true tongues are human languages, even if the one speaking has no idea which language they are speaking and those present have no idea what language they are speaking. They could be speaking a DEAD language for all I know or they know. Therefore, since they are not speaking in their native tongue, they do not understand what they are saying.
Then the Lord put forth his hand, and touched my mouth. And the Lord said unto me, Behold, I have put my words in thy mouth.
See, I have this day set thee over the nations and over the kingdoms, to root out, and to pull down, and to destroy, and to throw down, to build, and to plant. Moreover the word of the Lord came unto me, saying, Jeremiah, what seest thou? And I said, I see a rod of an almond tree. Then said the Lord unto me, Thou hast well seen: for I will hasten my word "to perform it". Jerimiah 1:9-12
In Job 23 we are informed he performs the thing that is appointed for me: and many such things are with him.as a imputed righteousness Again a work He performs in us to both will and do His good pleasure .He is of one mind in that way always doing whatsoever His soul pleases it is he that does make our hearts soft
But he is in one mind, and who can turn him? and what his soul desireth, even that he doeth.For he performeth the thing that is appointed for me: and many such things are with him.Therefore am I troubled at his presence: when I consider, I am afraid of him.
For God maketh my heart soft, and the Almighty troubleth me:Job 23:13-16
We I believe should look to the foundation of the use of tongues not found in the new testament. The sign is not in respect to those who receive prophecy(God's word) .There is no outward visible sign for the believer who walks by faith (the unseen). The idea of a "sign gift" is foreign to the scriptures.
But rather the sign points to apostate Jews that stop up their ears and refused to believe God as that which alone comes by comparing that which is written to that which is written or faith to faith. The sign does not point to the believer of prophecy. But is a sign to those who oppose it as it is written. God with stammering lip (mocking lips ) is the speaker , as it informs us( precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little: (sola scriptura) ). They were following the oral traditions as a law of the fathers (men) making all things written in the law and the prophets with out effect.
Note... to fall backward is a sign men are under the judgment of God. The sign seekers( Charismatics) today have turned that up side also, being slain in the spirit is a hope that proves they are with God
For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little:
For with stammering lips and another tongue will he speak to this people.To whom he said, This is the rest wherewith ye may cause the weary to rest; and this is the refreshing: yet they would not hear. But the word of the Lord was unto them precept upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little; that they might go, and fall backward, and be broken, and snared, and taken .Wherefore hear the word of the Lord, ye scornful men, that rule this people which is in Jerusalem.
Because ye have said, We have made a covenant with death, and with hell are we at agreement; when the overflowing scourge shall pass through, it shall not come unto us: for we have made lies our refuge, and under falsehood have we hid ourselves:
Therefore thus saith the Lord God, Behold, I lay in Zion for a foundation a stone, a tried stone, a precious corner stone, a sure foundation: he that believeth shall not make haste Isaiah 28
Zion is another way of identifying the bride of Christ, the church... he that believes prophecy shall not make haste or has the patience of the saints.