Following are a number of back-translations as well as a sample translation for translators of Isaiah 9:13:

• Kupsabiny: “Those people did not repent,
  even though God punished them.
  They did not return to the God of authority.” (Source: Kupsabiny Back Translation)
• Newari: “But the people who were stricken have neither returned to Him,
  nor have they sought the LORD, the greatest of all.” (Source: Newari Back Translation)
• Hiligaynon: “But the people of Israel still will- not -turn-back to the LORD Almighty who had punished them.” (Source: Hiligaynon Back Translation)
• English: “He says, ‘By my own great power I have done these things.
  I have been able to do them because I am very wise and very intelligent.
  My army removed the barriers at the borders of nations
  and carried away all their valuable things.
  My army has knocked down their kings like a ferocious bull would.” (Source: Translation for Translators)