Following are a number of back-translations as well as a sample translation for translators of Isaiah 13:12:

• Kupsabiny: “I shall make people to be few in the land.
  surpassing the clean/pure gold of Ophir.” (Source: Kupsabiny Back Translation)
• Newari: “I will make people scarcer than extremely pure gold,
  and even much more expensive than the gold of Ophir.” (Source: Newari Back Translation)
• Hiligaynon: “Only few people will be left. They are more harder to find compare than the pure gold from Ofir.” (Source: Hiligaynon Back Translation)
• English: “And because I will cause most people to die,
  people will be harder to find than gold,
  harder to find than fine gold from Ophir in Arabia.” (Source: Translation for Translators)