Following are a number of back-translations as well as a sample translation for translators of Ecclesiastes 1:18:

• Kupsabiny: “If/When a person becomes wise, things bother him. And when he is understanding, life gives him much pain.” (Source: Kupsabiny Back Translation)
• Newari: “For if there is much wisdom, there is much heartache,
  with much knowledge there comes much grief” (Source: Newari Back Translation)
• Hiligaynon: “For when what I have-learned had-increased, my bad feeling also had-increased.” (Source: Hiligaynon Back Translation)
• English: “The wiser I became, the more disappointed I became.
  The more things I knew about, the sadder I became.” (Source: Translation for Translators)