Following are a number of back-translations as well as a sample translation for translators of Isaiah 42:6:

• Kupsabiny: “He says, ‘I am God.
  I have called you to do what is righteous.
  I take your hand and guard you.
  I shall make a covenant with people through you.
  You shall bring light to the nations.” (Source: Kupsabiny Back Translation)
• Newari: “I, the LORD have called you in accordance with my righteousness,
  I will take your hand and protect you.
  I will keep you and make you a symbol of my covenant with my people
  and a light for the non-Jews. ” (Source: Newari Back Translation)
• Hiligaynon: “He said to his servant, ‘I, the LORD, is the one-who-called you (sing.) to show my righteousness. I will-help and protect you (sing.) and through you (sing.) I will-make a covenant with/to the people. I will-make you (sing.) like a lamp which will-shine to the nations,” (Source: Hiligaynon Back Translation)