Following are a number of back-translations as well as a sample translation for translators of Ecclesiastes 5:17:

• Kupsabiny: “Darkness and disaster has enveloped his life, coming across/meeting with pain, anger and violence.” (Source: Kupsabiny Back Translation)
• Newari: “All the days of his life were disappointing,
  it was nothing but suffering and anger and spending it in darkness.” (Source: Newari Back Translation)
• Hiligaynon: “Our (incl.) life is full of difficulty, trouble, sickness, and anger.” (Source: Hiligaynon Back Translation)
• English: “Furthermore, rich people are always miserable and sad,
  and depressed/discouraged and often sick and resentful/thinking that what has happened to them is unfair.” (Source: Translation for Translators)