Following are a number of back-translations as well as a sample translation for translators of Isaiah 23:9:

• Kupsabiny: “It is the God of authority who was planning those things,
  so as to bring an end to pride of those people
  and shame the wealthy in the whole world.” (Source: Kupsabiny Back Translation)
• Newari: “In order to belittle the pride of the city and of all who keep on being proud,
  [and] to humble all the famous names of the earth,
  The LORD, the greatest of all, has set up this plan.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD Almighty is the one who planned this in-order to-bring-low the one-(who)-boasts of his greatness and those who are recognized as popular/well-known in the world.” (Source: Hiligaynon Back Translation)
• English: “It was the Commander of the armies of angels who did it;
  he did it in order to cause you people in Tyre not to be proud any more,
  to humiliate you men who are honored all over the world.” (Source: Translation for Translators)