When we are teaching people on the Baptism of Holy Ghost and speaking in tongues!

like mentioned in

Matthew 3:11 I indeed baptize you with water unto repentance: but he that comes after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire:

When talking to people speaking in tongues or another tongue like in:

Acts 2[1] And when the day of Pentecost was fully come, they were all with one accord in one place.
[2] And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
[3] And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
[4] And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.

We must know they did speak in other languages so they could understand each other. That was a gift of spirit and has nothing to do with the power of the spirit! That enters into a person and becoming their comforter.
This scripture talks about cloven tongues and the spirit of utterance.
The evidence of someone receiving the Gift of the Baptism Holy Ghost
We as teachers should tell our students, that we have received a heavenly language to speak directly to the Father or the tongue of Angels.
If a person has been saved, as they teach saved by grace! There is a big chance that other Christians or so called Christian! Who have never spoke in tongues, will talk against tongues.
Yet when you say the tongues of angels, or heavenly language, prayer language. New be-lievers will ask what that is rather than put up a carnal block about the tongues. Then you can explain the evidence of tongues is exactly that, it it the evidence of receiving the baptism of the Holy ghost. The gift is the Holy ghost not tongues as talk in most parts of religion.
The evidence of speaking in a heavenly language. The tongues of men and angels, meaning all earthly languages spoke in all countries of this world. There is way of talking to the father directly in a heavenly language only he understands. God bless remember don’t use tongues when explaining. Trust me in all the years teach people about receiving the Holy Ghost as a gift . It comes up almost every time.