1 Corinthians 14:26-28 (NIV) says:
26 What then shall we say, brothers and sisters? When you come together, each of you has a hymn, or a word of instruction, a revelation, a tongue or an interpretation. Everything must be done so that the church may be built up. 27 If anyone speaks in a tongue, two—or at the most three—should speak, one at a time, and someone must interpret. 28 If there is no interpreter, the speaker should keep quiet in the church and speak to himself and to God.
If there is no interpreter around, verse 28 recommends to stay quiet in the church and instead to speak to oneself and to God. What I don't understand is, if we have to stay quiet in the church in the absence of interpreters, where are we supposed to "speak to ourselves and to God" then? In a private setting?