Following are a number of back-translations as well as a sample translation for translators of Joel 2:5:

• Kupsabiny: “When they gallop over the hill,
  it sounds like carts/chariots of horses.
  (It/they) comes crackling like a flaming fire
  when grass is being burned.
  They are like many soldiers
  who are prepared for battle.” (Source: Kupsabiny Back Translation)
• Newari: “Like the sound of chariots running at the top of the hills
  and the sound of fire that devours completely,
  is the line-up of strong soldiers just about to depart for war.” (Source: Newari Back Translation)
• Hiligaynon: “The noise of their leaping/jumping on the top of the mountains/hills seems like chariots which are-being-driven/[lit. are-being-run] or burning straw. They (are) just like the mighty soldiers who (are) now ready to fight.” (Source: Hiligaynon Back Translation)