Following are a number of back-translations as well as a sample translation for translators of Isaiah 40:16:

• Kupsabiny: “One may not cut down in the hills of Lebanon
  enough firewood
  to be used to burn sacrifices to God.
  All the animals in the forest are not enough
  to be used to make sacrifices for/to God.” (Source: Kupsabiny Back Translation)
• Newari: “To offer a burnt offering on the altar of our God
  there would not be animals enough in the forest of Lebanon
  nor would there be enough trees to burn.” (Source: Newari Back Translation)
• Hiligaynon: “The animals in Lebanon are not enough/sufficient to offer for him, and its trees are not enough/sufficient to-use-as-fire-woods for the offerings.” (Source: Hiligaynon Back Translation)
• English: “All those who make idols will be humiliated.
  They will all be disgraced together.” (Source: Translation for Translators)