1 Corinthians

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Bible Question (short): Are tongues a world language or not?

Question (full): I see here another question about tongues. I would also like to ask one because this is an area that is very fuzzy for me.
I did the search on "tongues" but could not get satified with the results.
All the scripture that I find in the New Testament seem to refer to tongues as a structured foreign language which is understandable to people of a particular country, not an unintelligeble babble.
I know 1Cor.14:2 says they speak to God, but if I was in a crowd of english speaking Christians and began speaking in chinese without anyone that understood chinese the assumption would have to be that I was speaking only to God because He is the only one who could understand me.
The Greek word used for "tongues" is Strongs:Number 1100 glossa (gloce-sah)

1) the tongue, a member of the body, an organ of speech
2) a tongue
1a) the language or dialect used by a particular people distinct
from that of other nations

1Cr 14:10 There are, it may be, so many kinds of voices IN THE WORLD, and none of them (is) without signification. (I put caps to accent)

1Cr 14:11 Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh (shall be) a barbarian unto me.

The Greek word for "voice" used is:
5456 phone (fo-nay)
1) a sound, a tone
1a) of inanimate things, as musical instruments
2) a voice
2a) of the sound of uttered words
3) speech
3a) of a language, tongue
(again from Strongs)

The NASB also interprets the above passage as "languages of the world"

My question is where can it be interpreted from scripture that "tongues" is some kind of unintellegable babble that only God understands and not intended to refer to the structured languages of this world discribed in Acts 2:4-11?
(Let me say here that I don't put down this practice and love Christians who do it if they are comfortable with it and feel it helps them. I just don't understand it.)
Growing in Jesus,
Bob