ESV: The beginning of the words of his mouth is foolishness, and the end of his talk is evil madness.
NIV: At the beginning their words are folly; at the end they are wicked madness—
NASB: the beginning of his talking is foolishness, and the end of it is evil insanity.
CSB: The beginning of the words from his mouth is folly, but the end of his speaking is evil madness;
NLT: Fools base their thoughts on foolish assumptions, so their conclusions will be wicked madness;
KJV: The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.
NKJV: The words of his mouth begin with foolishness, And the end of his talk is raving madness.