Guys and gals, I (and no doubt others) WANT to understand the tongue thing
I your case, I not sure that you want to do anything but disparage it, and convince yourself (and others) that it's nothing but garbage.
1- When a person does it, is it a message for the speaker alone or for the speaker to also pass on to other people?
Depends on the circumstances. God's not a "One Trick Pony". If the tongue happens to be one understood by somebody listening, then the message is for THEM (the Acts 2 phenomenon). If you're alone, then you are "edifying yourself" (1 Cor 14:4). If you Speak in tongues in a MEETING, then it's mostly an "attention getter" for the subsequent Interpretation.
2- How can the audience know what it means?
Either by understanding it in their own language, or through the gift of interpretation
3- If the speaker interprets it into english for them, why didn't he/she simply speak english in the first place?
SInce you're so much WISER than God, you might want to try to instruct HIM to do thing YOUR WAY, instead of his.
4- How does tongues benefit the speaker or anybody else?
We already covered 1 Cor 14:4, so it's up to YOU to tell us why being spiritually "edified" is a BAD thing. And you'll have to explain to us why speaking something directly FROM the Holy Spirit is bad also (1 Cor 14:14)
5- Are non-tongue speakers spiritually inferior to speakers?
Nope. IF a person is Born Again of the Holy Spirit, and infilled with HIM (as ALL born again Christians are), then they're PERFECT before God, and Heaven bound. CHristians ALL have the Holy SPirit indwelling them, and leading them into TRUTH.
HOWEVER, Jesus ALSO told the boys to hang around Jerusalem until they were "ENDUED" (externally clothed) with POWER from on high, as recorded in Acts 2. SO -
NO MAJOR PENTECOSTAL DENOMINATION ties the baptism in the Holy Spirit (acts 2 issue) with SALVATION. People in the OLD Testament were also empowered in the same way - Samson, Isaiah, David, etc.
In my pwn case, after I was "Baptized in the Holy Spirit", (after being a Born again Christian for a decade), I DID (and still do) "Speak in tongues" in the private sense, but the
REAL PRACTICAL benefit of it was, Besides being gifted to occasionally Interpret Tongues, and speak Prophesy, was an immediate calling and burden to TEACH home groups, which I wouldn't have been able to do - before. The Acts 2 "baptism in the Holy Spirit", after all, is POWER in ministry. and "Tongues" is the scant "tip of the iceberg", so to speak. Some folks are natural "teachers", but when somebody who ISN'T a "natural", suddenly is called to teach for years, then something else is going on.
So if you reject, rationalize away, oppose the "Baptism in the Holy Spirit" you're also simply throwing away everything that's part of the package, to your own loss.
Are there"Problems", phonys, fakes, con-men/TV preachers? Sure!!! (remember the "Wheat and the Tares") The the presence of the FALSE, has no bearing on the existence of the REAL.