It is not possible to pray in genuine tongues without being baptised with the Spirit. This is the error that many make. They think that getting someone to speak in tongues means that they are baptised with the Spirit. This is why much speaking in tongues is just nonsense gibberish.
Firstly, the person needs to be genuinely born again of the Spirit, and show the fruit of a true conversion to Christ. This means that he or she has received Christ, who bled and died on the Cross for the remission of their sins, have truly repented of sin and showing the fruit of repentance. The Holy Spirit will not fill an unclean vessel who is unconverted. This is why there is so much falsehood in the "Charismania" contingent. Not enough discernment is done to ensure that the person is genuinely born again and is not just showing the outward form of godliness.
Secondly, they must ask for the baptism with the Spirit, and then receive it. As a result, there should be a result, a transformation. A change needs to be observed. It is at that point, that the person has the ability to pray in tongues, and he or she is encouraged to start speaking in faith. Usually, the flow of language comes out and it is clearly observed that the tongues language is genuine. It is usually accompanied by love, peace and joy and the river of living water flows out from the person. This is further accompanied by a more intense love and devotion to Jesus and the desire to glorify Him in his or her life and ministry.
So, we see that the baptism with the Spirit is much more than just knowing how to pray or speak in tongues. If people are seeking tongues for their own gratification or to please their church leaders or peers, then they are likely to receive a counterfeit, and be ruined for the real thing.