Following are a number of back-translations as well as a sample translation for translators of Proverbs 22:15:

• Kupsabiny: “Children do foolish things,
  but if (they) are punished/disciplined (they) will get rid of/move away from those things.” (Source: Kupsabiny Back Translation)
• Newari: “Unnecessary matters will be coming
  into the hearts of children,
  but by rebuking them
  such matters must be removed far from them.” (Source: Newari Back Translation)
• Hiligaynon: “(It is) already the behavior of the children to do-foolishness, but this behavior can-be-straightened if they will-be-disciplined.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Already-original is the foolishness of all children, but if you (sing.) beat/whip (them), it-is-possible that it-be-changed.” (Source: Kankanaey Back Translation)
• English: “Children naturally do things that are foolish,
  but if you punish/spank them , they will stop doing foolish things/learn to behave as they should.” (Source: Translation for Translators)