Following are a number of back-translations as well as a sample translation for translators of Isaiah 48:17:

• Kupsabiny: “This is the word that the God of Israel is saying
  the one who is righteous and who saves you.
  ‘I am your God.
  I teach you so I can make you well.
  I lead you to follow the path that is fitting/right.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD, the one who redeems you,
  and the holy God of Israel says like this,
  "I am the LORD, your God,
  who teaches you for your [own] good,
  who takes you along on the way that you must go.” (Source: Newari Back Translation)
• Hiligaynon: “‘The LORD your (plur.) Savior, the Holy God of Israel says: I am the LORD your (plur.) God who taught you (plur.) what is good for you (plur.) and guided you (plur.) in the right path.” (Source: Hiligaynon Back Translation)