Following are a number of back-translations as well as a sample translation for translators of Isaiah 21:5:

• Kupsabiny: “A feast is prepared and tables are spread/prepared.
  (People) are eating and drinking!
  And then (someone) calls,
  ‘You are being attacked, oh leaders
  prepare your shields!’” (Source: Kupsabiny Back Translation)
• Newari: “They will arrange a table.
  [They] will spread out a rich carpet.
  Then they will also prepare [lit.: do] to eat and drink.
  "O officers, get up,
  put oil on [your] shield."” (Source: Newari Back Translation)
• Hiligaynon: “The officials are preparing a feast. They put a coverings so that they could sit. They eat and drink, and at-once/right-away one shouted to them, ‘Come/Hurry, be ready for war!’” (Source: Hiligaynon Back Translation)
• English: “In the vision I saw that the leaders of Babylonia were preparing a great feast.
  They had spread rugs for people to sit on;
  everyone was eating and drinking.
  But they should get up and prepare their shields,
  because they are about to be attacked!” (Source: Translation for Translators)