Can we Discern the Tongue

I always believed that whenever someone speaks in tongue in prayers, it should be interpreted by someone also.

We cannot judge, but we can discern whatever is the motives of the person.

Prayer does not require flowery words for God looks into our hearts. Whatever is the intent on the heart, it is the Lord who knew.

But people must understand what has been said or murmurings will follow. I heard people asking one to another what has been said because none understood. Is it on our language? Is it just to let others know that there's a tongue? Is it just an added thing in your prayer? Who knows?

When i heard the "tongue", i tried to understand it but to no avail. But i would like to know what does it mean.

Shalom everyone!!

1 Corinthians 14 (King James Version)
"1Follow after charity, and desire spiritual gifts, but rather that ye may prophesy.
2For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.
3But he that prophesieth speaketh unto men to edification, and exhortation, and comfort.
4He that speaketh in an unknown tongue edifieth himself; but he that prophesieth edifieth the church.
5I would that ye all spake with tongues but rather that ye prophesied: for greater is he that prophesieth than he that speaketh with tongues, except he interpret, that the church may receive edifying.
6Now, brethren, if I come unto you speaking with tongues, what shall I profit you, except I shall speak to you either by revelation, or by knowledge, or by prophesying, or by doctrine?
7And even things without life giving sound, whether pipe or harp, except they give a distinction in the sounds, how shall it be known what is piped or harped?
8For if the trumpet give an uncertain sound, who shall prepare himself to the battle?
9So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air.
10There are, it may be, so many kinds of voices in the world, and none of them is without signification.
11Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me.
12Even so ye, forasmuch as ye are zealous of spiritual gifts, seek that ye may excel to the edifying of the church.
13Wherefore let him that speaketh in an unknown tongue pray that he may interpret.
14For if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
15What is it then? I will pray with the spirit, and I will pray with the understanding also: I will sing with the spirit, and I will sing with the understanding also.
16Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest?
17For thou verily givest thanks well, but the other is not edified."