Following are a number of back-translations as well as a sample translation for translators of Isaiah 42:13:

• Kupsabiny: “God will lead (people) in battle like a young brave man
  and stir himself up like a young man of battle.
  He shouts loudly,
  showing the enemies his fierceness.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD will come out like a very strong man.
  Like a strong soldier he will show the passion for battle.
  He will cry out loudly and loudly lift up the voice of war.
  He will defeat his enemies.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD will-fight like a soldier who is very ready to fight. He will-shout as a sign to attack, and he will-win against his enemies.” (Source: Hiligaynon Back Translation)