There may be no evidence of Holy Tongues spoken by Jesus, but they are certainly a gift from Holy Spirit.
Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater works than these shall he do; because I go unto my Father.
""Then Peter said unto them, Repent "(have a change of mind)", and be baptized"" "(i.e. immersed)" every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost." "- with the evidence of speaking in tongues - ACTS 2:38.
At least three times Jesus was quoted, then the writer said that "being INTERPRETED is..." NO tongues are unknown or strange to God.
As there are 6,000 tongues in the world, I doubt that any 'scholar' could even recognize all of them, much less could they interpret all of them. And THEN there are 'tongues of angels'.
20 Then the disciples went out and preached everywhere, and the Lord worked with them and <<<<<confirmed his word by the signs that accompanied it.>>>>>
Paul and Barnabas went as usual into the <<<Jewish synagogue.>>> There they spoke so effectively that a great number of Jews and Greeks believed. But the ~~~~~Jews who refused to believe~~~~~ stirred up the other Gentiles and poisoned their minds against the brothers.
3 Long time therefore abode they *speaking boldly in the Lord,* <<<<<which gave testimony unto the WORD of his grace,>>>>> and ~~~~~granted signs and wonders to be DONE BY THEIR HANDS.~~~~~