Following are a number of back-translations as well as a sample translation for translators of Isaiah 24:21:

• Kupsabiny: “The day shall come when God shall punish the spirits of heaven/up there
  and the rulers of countries on this earth.” (Source: Kupsabiny Back Translation)
• Newari: “On that day the LORD will punish the power of the heavens
  and the kings of the earth.” (Source: Newari Back Translation)
• Hiligaynon: “At that time, the LORD will-punish the powerful creatures in heaven, and the kings in the world.” (Source: Hiligaynon Back Translation)