Berean Study Bible (BSB) - 1 Corinthians 14:11 >

If, then, I do not know the meaning of someone’s language, I am a foreigner to the speaker, and he is a foreigner to me.

Textus Receptus (TR) - 1 Corinthians 14:11 >

Ἐὰν οὖν μὴ εἰδῶ τὴν δύναμιν τῆς φωνῆς, ἔσομαι τῷ λαλοῦντι βάρβαρος, καὶ ὁ λαλῶν ἐν ἐμοὶ βάρβαρος.