The spiritual gift of interpretation of tongues is found alongside the gift of speaking in tongues in 1 Corinthians 12:10. The Greek word for interpretation is hermeneia and simply means to interpret, explain, or expound some message that is not able to be understood in a natural way. Thus, this spiritual gift is the supernatural ability to understand and explain messages uttered in an unknown language.
This is a revelatory gift, meaning that God “reveals” the meaning of the words or message being spoken and allows the interpreter to communicate its meaning to those who need to hear it. When this happens in the church two things happen: the church is edified and God is glorified.
The spiritual gift of interpretation is given by the Holy Spirit to certain individuals to reveal messages spoken in an unknown tongue to God for the building up of the church. Like the gift of prophecy, tongues that are interpreted have the effect of encouraging and blessing the church to love and serve God more deeply and effectively. See also 1 Corinthians 12:10, 30; 14:1-28.