Following are a number of back-translations as well as a sample translation for translators of Isaiah 50:1:

• Kupsabiny: “God is saying,
  ‘Where is the letter that shows that
  I broke the marriage contract and sent away your mother?
  Do you think that you were driven away to become slaves
  because I sold you and had a debt to repay?
  No, not at all.
  You were driven to become slaves because of your sins,
  and your mother was chased away for your disobedience.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD says like this,
  "I did not send your mother away with a certificate of divorce!
  I did not sell you to any to whom I owed money!
  But look, you were sold because of your sins,
  your mother was sent away because of your evil deeds.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD said to his people, ‘Did- I -reject Jerusalem like a husband who separated his wife? [You (plur.)] prove [it]! Did- I -cause- you (plur.) -to-be-taken-captives like a man who caused- his children -to-become-slaves to his creditor as payment of his debts/loan? None! You (plur.) were-taken-captives because of your (plur.) sins; Jerusalem was-rejected because of your (plur.) trespasses.” (Source: Hiligaynon Back Translation)
• English: “This is also what Yahweh says:
  ‘You Israeli children, do not think that I forced your parents to be exiled/taken to Babylonia
  like some men send away their wives
  after giving them a paper
  on which they state that they were divorcing them!
  I certainly did not get rid of you like a man who sells his children to get money to pay what he owes.
  No, the reason that I forced you to be exiled
  was to punish you because of the sins that you have committed.” (Source: Translation for Translators)