New Living Translation
For if you have the ability to speak in tongues, you will be talking only to God, since people won’t be able to understand you. You will be speaking by the power of the Spirit, but it will all be mysterious.

American Standard Version
For he that speaketh in a tongue speaketh not unto men, but unto God; for no man understandeth; but in the spirit he speaketh mysteries.

Berean Study Bible
For he who speaks in a tongue does not speak to men, but to God. Indeed, no one understands him; he utters mysteries in the Spirit.

Douay-Rheims Bible
For he that speaketh in a tongue, speaketh not unto men, but unto God: for no man heareth. Yet by the Spirit he speaketh mysteries.

English Revised Version
For he that speaketh in a tongue speaketh not unto men, but unto God; for no man understandeth; but in the spirit he speaketh mysteries.

King James Bible
For he that speaketh in an unknown tongue speaketh not unto men, but unto God: for no man understandeth him; howbeit in the spirit he speaketh mysteries.

World English Bible
For he who speaks in another language speaks not to men, but to God; for no one understands; but in the Spirit he speaks mysteries.

Young's Literal Translation
for he who is speaking in an unknown tongue -- to men he doth not speak, but to God, for no one doth hearken, and in spirit he doth speak secrets;

1 Corinthians 14:2 Additional Translations ...