Proverbs 24:7 New English Translation

⁷Wisdom is unattainable^[a] for a fool;
in court^[b] he does not open his mouth.^[c]

Proverbs 24:7 tc The MT reads רָאמוֹת (raʾmot, “corals”)—wisdom to the fool is corals, i.e., an unattainable treasure. With a slight change in the text, removing the א (ʾalef), the reading is רָמוֹת (ramot, “high”), i.e., wisdom is too high—unattainable—for a fool. The internal evidence favors the emendation, which is followed by most English versions including KJV.
Proverbs 24:7 tn Heb “[city] gate,” a metonymy of subject, meaning what goes on in the gate—court cases and business transactions. So it is in these assemblies that the fool keeps quiet. The term “court” has been used in the translation for clarity. Some English versions do not emphasize the forensic connotation here: NCV “in a discussion”; NLT “When the leaders gather.”
Proverbs 24:7 sn The verse portrays a fool out of his element: In a serious moment in the gathering of the community, he does not even open his mouth (a metonymy of cause, meaning “speak”). Wisdom is too high for the fool—it is beyond his ability.

New English Translation (NET)