Believe me you know when the Holy Ghost comes to dwell inside and begins speaking out from inside you. Clearly, the bible attests that this occurs at His arrival. In each of the detailed conversion accounts, 100% of those receiving the Holy Ghost spoke in tongues. (Acts 2, 10, 19) Even in Acts 8, the people knew they had not received the Holy Ghost upon believing in Jesus or when they were water baptized in his name. Peter and John came days later and assisted them in receiving the Holy Ghost. This is important since the word of God says in order for something to be established as true it will be referenced at least 2-3 times in scripture. (Matt. 18:16, 2 Cor 13:1)
Consider as well, scripture reveals tongues serve different purposes. Paul explains this in
1 Cor. 12 and
14.
Notice Paul's comment that no man understands what is being spoken when a person's spirit speaks to God in unknown tongues. (1 Cor 14:2) And when God wishes to convey a message to a congregation the Holy Spirit will manifest through both the gift of tongues and the gift of interpretation. (1 Cor. 12)
1 Cor 14:2
For 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.
1 Cor 14:14-19
For
if I pray in an unknown tongue, my spirit prayeth, but my understanding is unfruitful.
What 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.
Notice Paul says that through unknown tongues people give thanks well but others just don't understand what is being said:
Else 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?
For thou verily givest thanks well, but the other is not edified.
I thank my God, I speak with tongues more than ye all:
Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue."