About "tongues".... Again, go back to what the Word of God says and you will find the purposes for which God gives "tongues" or special languages to believers:
Before Jesus went back to Heaven, He promised that the Holy Spirit would come to us, believers, and we would be His temples to dwell in.
So when you become born-again, the Holy Spirit comes to dwell in you, seals your salvation, begins the sanctification process and starts leading you into truth, which goes on for a lifetime.
Jesus also told the people that they would be "endued with power" from on high, by the Holy Spirit.
I think all Christians can agree on that much. But they split into separate denominations after that, about how that all happens and more!
Pentacostals tend to believe that after being born-again, you will get a separate experience with God, called the "Baptism of the Holy Spirit". I personally believe that this "Baptism" in the Spirit can occur right at Salvation when you are "washed" from sin by the blood of Jesus and the Holy Spirit comes to dwell in you. You simply ask for the Holy Spirit to fill you!
Some Pentacostals believe that the "evidence" that you have been baptized in the Spirit is that you begin to speak in tongues at that moment. Other churches simply believe we are recognized as Holy Spirit-filled believers as we demonstrate the "fruit of the Spirit" in our lives and that tongues is a special gift that God gives to some believers, not all.
Some Pentacostals have experienced tongues as a "prayer language", personal between the person and God.
The Holy Spirit intercedes in prayers between them and God.
O.k., so it comes down to how one interprets certain verses, but you should always understand verses in their context.
And it is about how God decides to work in and through you and others! We should NOT put God in a box, but let Him move as He wills to!
As for myself, I have been around Pentacostals and other kinds of believers, and I accept how God works with each of them and do not debate. But "tongues" is clearly in the Scripture, so it should not be ignored, feared, or shunned.
I have been in Pentacostal groups where the Holy Spirit gives a prophecy in tongues to a certain person and another person gifted with interpretation lets us all know what was said. That is good!
One thing I like about most Pentacostal churches, is that you can usually find someone who will pray with you, because they believe strongly in the power of prayer, not where it is just religious words or a ritual, but real powerful prayer!! They do as the Scripture says, to come boldly before God and ask! And when we ask and receive, our joy becomes full!! And we share in each other's joy!
Pentacostals also do as the Scripture says, to lay hands on the sick and believe they will recover!
Yes, they believe in divine healing, miracles, and living an active faith! They go beyond the milk of the Word and get into the real meat too.