The accounts relative to speaking in tongues indicate the manifestation serve different purposes. One manifestation applies in Blain's case when overzealous believers tried to intervene on his behalf. And one manifestation relies upon the gift of interpretation:The Holy Spirit can't contradict himself, and he instructs that if there is no one to interpret, no one should speak (in tongues).
1. Speaking in tongues automatically manifest upon the arrival of the Holy Ghost into the body of the believer. See Acts 2:4, 10:43-48, 19:1-7. Also, tongues is implied in Acts 8:12-18. After believing and obeying the gospel the individuals knew they had not yet received the Holy Ghost. And, days later they knew without a doubt they had.
In the above cases, there was no need for Peter, John and/or Paul to ascertain whether anyone was present who was used in the gift of interpretation. God automatically filled those in Acts 10 without assistance. And the other accounts reveal they prayed with and laid hands on those seeking to be filled with the Holy Spirit. The same is true today.
2. After the Holy Ghost has taken up residence in a believers body they are able to speak and sing to God in tongues on a regular basis. No man understands what is being said. Not even the one speaking. The interaction is between the Holy Spirit and man's renewed spirit. Giving God access to one's spirit is an act of faith and the experience edifies the individual. As such, the gift of interpretation does not apply.
3. The following is when the gift of interpretation applies:
The Spirit of God has a willing believer present a message to the congregation via the gift of tongues. The message in tongues is revealed to a person by the Spirit. And they present the message in the known language of the congregation.
