Following are a number of back-translations as well as a sample translation for translators of Isaiah 38:10:

• Kupsabiny: “I was thinking that I would expire
  in the middle of my life.
  I thought that I was going to
  there in the realm of the dead.” (Source: Kupsabiny Back Translation)
• Newari: “I thought, "In my very best time of life
  I have to go to the world of the dead
  so from I will not live.” (Source: Newari Back Translation)
• Hiligaynon: “I thought I might die young, and stay/be-left-behind in the place of the dead-ones.” (Source: Hiligaynon Back Translation)
• English: “I thought to myself, ‘Is it necessary for me to die and go to the place where the dead people are
  during this time of my life when I am still strong?
  Is Yahweh going to rob me of the remaining years that I should live?’” (Source: Translation for Translators)