Following are a number of back-translations as well as a sample translation for translators of Isaiah 38:15:

• Kupsabiny: “Now what shall I still say?
  You alone have done this.
  All my sleep died from me
  because of the pain I have.” (Source: Kupsabiny Back Translation)
• Newari: “But now, what can I say?
  He has talked with me and he has done like this,
  by reason of the anxiety for my life
  I will be humble until the end of my life.” (Source: Newari Back Translation)
• Hiligaynon: “But what can I still say? For he already answered me and he himself is the one who healed me. I will-live in humbleness because of the bitterness that I experienced.” (Source: Hiligaynon Back Translation)
• English: “But there was really nothing that I could say and ask him to reply to me,
  because it was Yahweh who sent this illness.
  So now I will live humbly during my remaining years
  because I am very anguished.” (Source: Translation for Translators)