Following are a number of back-translations as well as a sample translation for translators of Ecclesiastes 7:18:

• Kupsabiny: “Do not lean towards any of these two sides (be impartial),
  the one who obeys God does not lean to any side.” (Source: Kupsabiny Back Translation)
• Newari: “To take hold of one and to not let go of the other, are both good.
  The man who fears God, he is staying away from all extremes.” (Source: Newari Back Translation)
• Hiligaynon: “[You (sing.)] do not overly-do those things; you (sing.) should only be in the middle, for the one-who-respects God does not overly-do.” (Source: Hiligaynon Back Translation)
• English: “Continue to avoid doing what is evil and doing what is foolish;
  avoid doing both of those things by continually revering God.” (Source: Translation for Translators)