1 Corinthians 14:23 (NKJV)
Therefore if the whole church comes together in one place, and all speak with tongues, and there come in those who are uninformed or unbelievers, will they not say that you are out of your mind?
1 Corinthians 14:26b (NKJV)
Let all things be done for edification.
1 Corinthians 14:40 (NKJV)
Let all things be done decently and in order.
I don't have the gift of tongues. I've tried it but all that comes out is mumbo jumbo, didn't get a blessing out of it. I guess I should have tried it around someone who could interpret. I know some people who claim to have the gift and I've even heard some practice it. But I was not blessed. I've seen worship services where tongues were spoken and someone interpreted. Still wasn't blessed by it, in fact I saw some real disorder in that place and got very uncomfortable.
I've read some commentators who say that tongues is simply a foreign language. You could substitute the word language for the word tongues and it would all fit. I don't know though.
It seems the point of Paul's exhortations to the Corinthian church regarding this subject is summed up in the last two verses quoted above. Build people up in the Lord, do things decently, organize your worship. Going much further than that on this subject, I'll just have to claim this next verse...
1 Corinthians 14:38 (NKJV)
But if anyone is ignorant, let him be ignorant.