Albert Barnes Commentary 1 Corinthians 14:17

"For thou verily givest thanks well, but the other is not edified." — 1 Corinthians 14:17 (ASV)

For thou verily givest thanks well. That is, even if you use a foreign language. You do it with the heart; and it is accepted by God as your offering; but the other, who cannot understand it, cannot be benefited by it.