A companion gift to speaking in tongues is the gift of interpretation. It is just what it says. One person will speak a message in an unknown tongue and someone else will tell everyone what he said. Evidently it doesn’t work quite that smooth because Paul gives a caution,
(1 Corinthians 14:28 KJV) But if there be no interpreter, let him keep silence in the church; and let him speak to himself, and to God.So the basic rule seems to be if there is not interpreter, there should be no speaking in tongues. At least in the church. Some feel that the private prayer language is an exception to this verse.
homo unius libri