Following are a number of back-translations as well as a sample translation for translators of Isaiah 19:3:

• Kupsabiny: “The strength of the Egyptians shall be finished.
  and their plans disrupted.
  They shall be asking words from the idols they are bowing to,
  or asking the ancestral spirits and sorcerers.” (Source: Kupsabiny Back Translation)
• Newari: “The hearts of the Egyptians will get discouraged
  and I will destroy the plans that they make.
  To the place of their gods, to the place of chanting and incantation
  and to the place where [they] do evil spirit work, [they] will go to take counsel.” (Source: Newari Back Translation)
• Hiligaynon: “The Egiptohanon will-lose courage, and I will-confuse them of their plans. They will-take-refuge to the little-gods, to the souls of the dead-ones, to the witchcrafts and to the spiritists.” (Source: Hiligaynon Back Translation)
• English: “The people of Egypt will become very discouraged,
  and I will cause their plans not to be successful.
  They will plead with idols and sorcerers and those who talk with spirits of dead people
  to tell them what they should do.” (Source: Translation for Translators)