Berean Study Bible
Although I am not a polished speaker, I am certainly not lacking in knowledge. We have made this clear to you in every way possible.

King James Bible
But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things.

American Standard Version
But though I be rude in speech, yet am I not in knowledge; nay, in every way have we made this manifest unto you in all things.

Darby Bible Translation
But if [I am] a simple person in speech, yet not in knowledge, but in everything making [the truth] manifest in all things to you.

Douay-Rheims Bible
For although I be rude in speech, yet not in knowledge; but in all things we have been made manifest to you.

English Revised Version
But though I be rude in speech, yet am I not in knowledge; nay, in everything we have made it manifest among all men to you-ward.

Young's Literal Translation
and even if unlearned in word -- yet not in knowledge, but in every thing we were made manifest in all things to you.