Following are a number of back-translations as well as a sample translation for translators of Isaiah 50:4:

• Kupsabiny: “God is teaching me the words that I am saying
  so that I know how to encourage a person who is in despair.
  He always wakes me in the morning
  I hear the words that he teaches me.” (Source: Kupsabiny Back Translation)
• Newari: “LORD God has given me consolation to the tired people
  God has taught me to talk like his disciple.
  He wakes me every morning.
  He opens my ears to listen, by giving attention like a student.” (Source: Newari Back Translation)
• Hiligaynon: “The Lord GOD taught me as to what I will-say so-that I can strengthen the ones-who-are-weary/[lit. tired]. Every morning he wakes- me -up to listen to what he is going to teach me.” (Source: Hiligaynon Back Translation)
• English: “Yahweh our God has given me his wise message
  in order that I may encourage those who are weary.
  Each morning he awakens me,
  in order that I may listen to what he teaches me.” (Source: Translation for Translators)