Following are a number of back-translations as well as a sample translation for translators of Isaiah 55:4:

• Kupsabiny: “I made him to become a leader of nations,
  to lead and advise them.
  I used him
  so I could show them my power.” (Source: Kupsabiny Back Translation)
• Newari: “Look! I chose him to give testimony among the nations
  and to become their captain and leader.” (Source: Newari Back Translation)
• Hiligaynon: “I have-made him a leader/[lit. head] to the nations, and by him I have-shown my power to them.” (Source: Hiligaynon Back Translation)