Following are a number of back-translations as well as a sample translation for translators of Amos 3:11:

• Kupsabiny: “So enemies will lay siege to their land and destroy their walls. They will plunder the things from those protected cities.’” (Source: Kupsabiny Back Translation)
• Newari: “Therefore, this is what LORD God says,
  ‘An enemy will surround your nation.
  They will destroy your protected fortresses
  They will loot your dwelling places.” (Source: Newari Back Translation)
• Hiligaynon: “For this is what- the Lord GOD -is-saying against Samaria: ‘They do- not -know how to do right, and the firm/strong portions of their city are-filled with stolen and plundered things. Therefore they will-be-attacked by the enemies and their defenses will-be-destroyed. The enemies will-take-away the properties from the strong/sturdy portions of their city.’” (Source: Hiligaynon Back Translation)
• English: “So Yahweh our God says that soon their enemies will come
  and tear down their defenses/high city walls
  and take away those valuable things.” (Source: Translation for Translators)