You will have to bare with me on this post folks.
i'm not saying that I have got this right or think this is entirely correct, it's just that I have been musing over this thread and the following thoughts and possible alternative ideas came to mind. It may be a load of hokum pokum or maybe there is some grains of truth in this. See what you think.
Is it possible that in the next life in heaven the way of communicating will not be on the form of language that we currently have and will take an entirely different form.
just a few verses for consideration
Revelation 1:15-17 NKJV
[15] His feet were like fine brass, as if refined in a furnace, and His voice as the sound of many waters; [16] He had in His right hand seven stars, out of His mouth went a sharp two-edged sword, and His countenance was like the sun shining in its strength. [17] And when I saw Him, I fell at His feet as dead. But He laid His right hand on me, saying to me, "Do not be afraid; I am the First and the Last.
In this his voice was as the sound of many waters.
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Revelation 4:1 NKJV
[1] After these things I looked, and behold, a door standing open in heaven. And the first voice which I heard was like a trumpet speaking with me, saying, "Come up here, and I will show you things which must take place after this."
in this this the voice was like a trumpet
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Revelation 6:1 NKJV
[1] Now I saw when the Lamb opened one of the seals; and I heard one of the four living creatures saying with a voice like thunder, "Come and see."
in in this the voice was like thunder
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Revelation 7:9 NKJV
[9] After these things I looked, and behold, a great multitude which no one could number, of all nations, tribes, peoples, and tongues, standing before the throne and before the Lamb, clothed with white robes, with palm branches in their hands,, [10] and crying out with a loud voice, saying, "Salvation belongs to our God who sits on the throne, and to the Lamb!"
in this there were people of all tongues but they all cried out together and spoke together. Maybe they were all hearing and understanding all known languages.
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Revelation 10:2-4 NKJV
[2] He had a little book open in his hand. And he set his right foot on the sea and his left foot on the land, [3] and cried with a loud voice, as when a lion roars. When he cried out, seven thunders uttered their voices. [4] Now when the seven thunders uttered their voices, I was about to write; but I heard a voice from heaven saying to me, "Seal up the things which the seven thunders uttered, and do not write them."
voice as when a lion roars and the seven thunders uttered their voices, this appears to relate to the 7 Angels with the 7 trumpets.
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Revelation 14:2 NKJV
[2] And I heard a voice from heaven, like the voice of many waters, and like the voice of loud thunder. And I heard the sound of harpists playing their harps.
the voice of many waters and loud thunder again
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Job 37:5 NKJV
[5] God thunders marvelously with His voice; He does great things which we cannot comprehend.
Note this is from Job one of the oldest books in the bible.
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Isaiah 6:1-4 NKJV
[1] In the year that King Uzziah died, I saw the Lord sitting on a throne, high and lifted up, and the train of His robe filled the temple. [2] Above it stood seraphim; each one had six wings: with two he covered his face, with two he covered his feet, and with two he flew. [3] And one cried to another and said: "Holy, holy, holy is the LORD of hosts; The whole earth is full of His glory!" [4] And the posts of the door were shaken by the voice of him who cried out, and the house was filled with smoke.
What we think of as speech would not make the door posts shake and vibrate.
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The language of heaven as mentioned several times in Revelation, seems to be primarily concerned with worship. What if heaven will be a place where we will understand all forms of language and communication whether that is human verbal sounds, the sounds of nature water, thunder, fire etc , (all creation groans due to the fall), the sounds of animals (the lion will lie with the lamb who will also understand each other), that worship will not just be sound but might also be a form of communication, what if even colour and light will be a form of communication. There is a lot of symbolism in the bible much incorporating colour.
Maybe it's a little impertinent to think human language will be the only form of communication. No eyes have seen no ears have heard etc.....