Following are a number of back-translations as well as a sample translation for translators of Ecclesiastes 7:28:

• Kupsabiny: “I have searched for an answer that covers everything but I did not get it. Out of one thousand people I found one (young) man only who was straight and there was no woman that I found.” (Source: Kupsabiny Back Translation)
• Newari: “it was not possible to do so.
  I found one upright man in a thousand
  but I was not able to find one upright woman among them all.” (Source: Newari Back Translation)
• Hiligaynon: “I who am a preacher said, ‘I contemplate very carefully each thing in my seeking/looking for an answer to my questions. Still I could not find the answers. But this is what I found-out: in 1,000 males only one is righteous, but in 1,000 females no one [intensifier] is righteous.” (Source: Hiligaynon Back Translation)
• English: “and I continued to try to learn more,
  but I could not find all that I was searching for.
  But one thing that I found out was that among 1,000 people I found one righteous man,
  but I did not find even one righteous woman.” (Source: Translation for Translators)