WHEN YOU DON'T KNOW HOW TO PRAY PROPERLY ABOUT A SITUATION, YOU CAN PRAY IN THE SPIRIT.

"Likewise the Spirit also helps in our weaknesses. For we do not know what we should pray for as we ought, but the Spirit Himself makes intercession for us with groanings which cannot be uttered. Now He who searches the hearts knows what the mind of the Spirit is, because He makes intercession for the saints according to the will of God" (Romans 8:26,27).

You may be used in the gifts of the Spirit.

"Now concerning spiritual gifts, brethren, I do not want you to be ignorant: you know that you were Gentiles, carried away to these dumb idols, however you were led. Therefore I make known to you that no one speaking by the Spirit of God calls Jesus accursed, and no one can say that Jesus is Lord except by the Holy Spirit. There are diversities of gifts, but the same Spirit.
5 There are differences of ministries, but the same Lord. And there are diversities of activities, but it is the same God who works all in all. But the manifestation of the Spirit is given to each one for the profit of all: for to one is given the word of wisdom through the Spirit, to another the word of knowledge through the same Spirit, to another faith by the same Spirit, to another gifts of healings by the same Spirit, to another the working of miracles, to another prophecy, to another discerning of spirits, to another different kinds of tongues, to another the interpretation of tongues. But one and the same Spirit works all these things, distributing to each one individually as He wills" (1 Corinthians 12:1-11).

The baptism in the Holy Spirit is the rest and refreshing promised in Old Testament prophesy, promised by Isaiah hundreds of years before Pentecost.

Your prayer language is a permanent gift, but the gifts of the Holy Spirit are supernaturally given to individuals as the Spirit wills; so we cannot claim any permanent gifts of the Holy Spirit. You may be used in a church in a ministry gift.

"And God has appointed these in the church: first apostles, second prophets, third teachers, after that miracles, then gifts of healings, helps, administrations, varieties of tongues. Are all apostles? Are all prophets? Are all teachers? Are all workers of miracles? Do all have gifts of healings? Do all speak with tongues? Do all interpret? But earnestly desire the best gifts. And yet I show you a more excellent way" (1 Corinthians 12:28-31).

The 13th chapter of Corinthians shares with us that the more excellent way to use the gifts is with love.

Your prayer language may be a language of men or of angels.  When you have a group of people singing in the Spirit, it sounds like an angelic choir.

Many people use verses 8-10 of this chapter to say that the gifts passed away when the New Testament was completed.  "That which is perfect has come" refers to the return of Jesus when the gifts will not be needed anymore. 

Many people are ignorant of the history of the church down through the ages.

Historical Background of the church:

Many writings of the early church fathers are available to us today, sharing about the gifts of the Spirit in their ministries and in the churches.  Tertullian, Hilary, Cyril, Basil, Gregory, Nazianzus, John of Apamea, Joseph Hazzaya and others down through the centuries.  St. Augustine , the great Catholic bishop from 396-430 A.D., near the end of his life, wrote in his famous work The City of God, "We shall do what the apostles did when they laid hands on the Samaritians and called down the Holy Spirit on them by the laying on of hands.  It is expected that new converts speak with new tongues."
The eleventh edition of Encyclopedia Britannica, Volume 27, pages 9, 10 states that speaking in tongues recurs in Christian revivals of every age.  It names many groups from the different ages.

In 1906 we had the Azusa Street, California revival that spread worldwide.  From this revival, many Pentecostal denominations were formed.  Then in the 1970's and the 1980's the Charismatic renewal broke out in all major denominational churches.
David Barrett's World Christian Encyclopedia gives an estimate of 523,700,000 as the Pentecostal / Charismatic Christian World population (Second Edition, Oxford, 2000).