Enormously presumptuous comment about professional linguists. Wonder who funded that research?But by all means provide a reference.
Thousands of reports of people speaking in other languages and those languages being interpreted correctly!
Here is one of many I have witnessed:
1986 I took leaders from a cessationist church I was attending to visit a Charasmatic church I had attended in my teens. A woman got up and shared a tongue, ten seconds later a man got up across the room and shared its interpretation. One of the leaders' wives turned to her sister and they looked amazed and started whispering back and forth. Later after the service was over the wife of the leader (Anna) asked me to introduce her to the woman who had shared the tongue. I did and Anna greeted her in another language. The woman gave her a blank stare. Anna tried a second time... no response. Finally Anna said, "I was introducing myself in Greek, you spoke perfect Greek earlier in the service. I grew up in Greece and you spoke it like a native speaker." Astonished, the woman turned to her husband and said, "Did you hear this woman, she said my tongue is Greek."
A minute later we repeated that scene but with the man whom had interpreted the Greek tongue. Here too, Anna greeted him in Greek and received blank stares. Both the tongue and the interpretation were flawless, and the tongue had the accent nad intonation of a Greek native!
Needless to say this ended the debate.
I speak in tongues and have since the summer of 1976. A missionary heard me speaking once and said it was a Central African dialect. I have prayed for dozens to receive the gift and some have received it instantly others took over 6 months to receive it, but all who asked received.
I asked people to make up a language on the fly and just speak it out... it always sounds like gibberish! Then I speak or ask someone with the gift of tongues to speak and ask the audience what they heard, not 1 in a 1000 has ever thought they were remotely the same.
I patiently await your professional luinguists' study...
On speaking in tongues...
Because secular universities (the only place one finds professional linguists these days) are so interested in studying obscure features of Charasmatic Evangelical Protestant phenomena.
That last part was unkind I know, but think of it as style-matching.