Following are a number of back-translations as well as a sample translation for translators of Isaiah 49:6:

• Kupsabiny: “He is saying,
  ‘Do not only rehabilitate the clans of Jacob
  and bring back the remnant of Israel,
  but I shall make you light of/for those who are not Jews
  so that it is possible for people in all parts of the world to be saved.’” (Source: Kupsabiny Back Translation)
• Newari: “this one, the LORD says like this —
  "To put the people of Jacob in its proper place again,
  and to bring back all who remain of Israel,
  is it a small matter for you to be my servant?
  That my salvation may reach up to the corners of the earth,
  I will also make you a light for the non-Jews."” (Source: Newari Back Translation)
• Hiligaynon: “He said, ‘You (sing.) who is my servant, I still have a great job which I will-cause- you (sing.) -to-do, aside from you (sing.) causing- the Israelinhon whom I protect -to-return. I will-make you (sing.) like a lamp that will-shine to the nations, so-that through you (sing.) the people in the whole world will-be-able to receive my salvation.’” (Source: Hiligaynon Back Translation)