Following are a number of back-translations as well as a sample translation for translators of Isaiah 40:23:

• Kupsabiny: “He pulls down leaders
  and makes kings of countries come down to become nothing.” (Source: Kupsabiny Back Translation)
• Newari: “He causes rulers to become useless,
  and the rulers who live on earth, he brings down, by making them nothing.” (Source: Newari Back Translation)
• Hiligaynon: “He takes-away the power of the leaders/[lit. heads] in the world and treated- them -as-no value.” (Source: Hiligaynon Back Translation)
• English: “I have solemnly declared, using my own name;
  I have spoken what is true,
  and I will never change what I have said:
  Some day, everyone will bow in front of me,
  and they will all solemnly promise to be loyal to me.” (Source: Translation for Translators)