Following are a number of back-translations as well as a sample translation for translators of Isaiah 48:2:

• Kupsabiny: “You claim that you belong to
  the holy city,
  and pretend/take yourselves to be trusting in the God of Israel
  who is called the God of authority.” (Source: Kupsabiny Back Translation)
• Newari: “You say that you are citizens of holy city
  and [that] you put [your] trust in the God of Israel.
  The LORD Almighty is his name.” (Source: Newari Back Translation)
• Hiligaynon: “You (plur.) even call yourselves residents of the holy city and you (plur.) say that you (plur.) trust/depend on the God of Israel, whose name is the LORD Almighty.’” (Source: Hiligaynon Back Translation)