Following are a number of back-translations as well as a sample translation for translators of Proverbs 27:22:

• Kupsabiny: “Even if a foolish person is beaten almost to death,
  his foolishness does not go far from him.” (Source: Kupsabiny Back Translation)
• Newari: “Put fools in a mortar
  and grind them like uncooked rice
  [but] even if [they] are ground
  they will not forsake their folly.” (Source: Newari Back Translation)
• Hiligaynon: “Even-though how/whatever you (sing.) punish a foolish man, you (sing.) can- never -remove his foolishness.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Even though you (sing.) pound-(with-a-pestle) a foolish-person, his foolishness will not be removed.” (Source: Kankanaey Back Translation)
• English: “Even if you beat/crush a fool severely like you pulverize grain with a pestle,
  you probably will not be able to cause him to stop being foolish/doing foolish things.” (Source: Translation for Translators)