GOD'S WORD® Translation
If I am righteous, my own mouth would condemn me. It would declare that I am corrupt even if I am a man of integrity.

American Standard Version
Though I be righteous, mine own mouth shall condemn me: Though I be perfect, it shall prove me perverse.

Berean Study Bible
Even if I were righteous, my mouth would condemn me; if I were blameless, it would declare me guilty.

Douay-Rheims Bible
If I would justify myself, my own mouth shall condemn me: if I would shew myself innocent, he shall prove me wicked.

English Revised Version
Though I be righteous, mine own mouth shall condemn me: though I be perfect, it shall prove me perverse.

King James Bible
If I justify myself, mine own mouth shall condemn me: if I say, I am perfect, it shall also prove me perverse.

World English Bible
Though I am righteous, my own mouth shall condemn me. Though I am blameless, it shall prove me perverse.

Young's Literal Translation
If I be righteous, Mine mouth doth declare me wicked, Perfect I am! -- it declareth me perverse.

Job 9:20 Additional Translations ...