Following are a number of back-translations as well as a sample translation for translators of Isaiah 2:21:

• Kupsabiny: “Those people shall flee to caves and holes,
  flee from God when he comes in anger and his power,
  that day when he makes the world shake.” (Source: Kupsabiny Back Translation)
• Newari: “When the LORD rises to shake the earth,
  they will go to hide in caves of rocks
  and holes in the ground to be saved from the punishment of the LORD
  and [from]his glory and awesome power” (Source: Newari Back Translation)
• Hiligaynon: “They will-flee towards the caves in the cliff and to huge/big rocks in-order to hide from the anger of the LORD and from his power when he will- now -shake the earth.” (Source: Hiligaynon Back Translation)
• English: “their signet rings and nose rings,” (Source: Translation for Translators)