For this reason the one who speaks in a tongue should pray that they may interpret what they say. For if I pray in a tongue, my spirit prays, but my mind is unfruitful. So what shall I do? I will pray with my spirit, but I will also pray with my understanding; I will sing with my spirit, but I will also sing with my understanding. Otherwise when you are praising God in the Spirit, how can someone else, who is now put in the position of an inquirer, say “Amen” to your thanksgiving, since they do not know what you are saying? You are giving thanks well enough, but no one else is edified. 1 Corinthians 14:13-17

            The spiritual gift of interpretation of tongues was used to bring meaning or sense to the unintelligible “tongues” being spoken by a person in a public gathering or worship.  This person listened to their “tongue” and then felt in their Spirit a meaning.

            If someone spoke in tongues but no one interpreted, that person was told to be quiet.

If anyone speaks in a tongue, two—or at the most three—should speak, one at a time, and someone must interpret. If there is no interpreter, the speaker should keep quiet in the church and speak to himself and to God. 1 Corinthians 14:27-28

            God is not a God of disorder, but order.  If he inspired someone to speak in tongues, then he would provide an interpreter.  If not, then that person was speaking in tongues for selfish reasons or demonic reasons to create chaos.