Following are a number of back-translations as well as a sample translation for translators of Isaiah 29:6:

• Kupsabiny: “the God of authority shall come against those enemies.
  Lightning and earthquake shall come,
  whirlwind and fire.’” (Source: Kupsabiny Back Translation)
• Newari: “The LORD Almighty
  will come with the great sounds of thunder [and] earthquakes,
  with cyclones and whirlwinds,
  [and with] destructive fire.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD Almighty will-remember Jerusalem, and he will-arrive with thunder, earthquake, great-noise, whirlwind, storm, and blazing fire.” (Source: Hiligaynon Back Translation)
• English: “The Commander of the armies of angels will come to help you
  with thunder and an earthquake and a very loud noise,
  with a strong wind and a big storm and a fire that will burn up everything.” (Source: Translation for Translators)