Following are a number of back-translations as well as a sample translation for translators of Isaiah 40:20:

• Kupsabiny: “(He) is not like a piece of wood that has been shaped,
  that a person has chosen/picked, wood that does not rot
  and then he looks for a good craftsman
  so he can from an idol that does not fall.” (Source: Kupsabiny Back Translation)
• Newari: “A person who is not able to make an idol of gold and silver will choose not rot wood,
  [and] so that the idol will not fall down he chooses a very skilled craftsman.” (Source: Newari Back Translation)
• Hiligaynon: “Or to the wooden little-god which is hard which does not easily rot, which is-being-made by a poor man as offering? He have- this -made by a skilled/[lit. good] carpenter so-that (it) will- not -fall.” (Source: Hiligaynon Back Translation)
• English: “You people who are still alive after experiencing great disasters,
  should come and gather together and listen to this:
  The people who carry around their wooden idols
  and pray to them are foolish, because those idols cannot rescue them!” (Source: Translation for Translators)