Following are a number of back-translations as well as a sample translation for translators of Isaiah 11:9:

• Kupsabiny: “There is nothing bad or sinful
  in Zion, that holy mountain of God.
  The people who know God will become many in the land/world
  like the water that is in the ocean.” (Source: Kupsabiny Back Translation)
• Newari: “Also, nothing in all my holy mountain will be able to harm them.
  And there will not be anything there that is not good.
  For like the sea is full of water,
  [so] the earth will be full of the knowledge of the LORD.” (Source: Newari Back Translation)
• Hiligaynon: “No-(one) now will-harm or will-destroy on my holy mountain. For the people in the world will-be-filled with the knowledge about the LORD, as the sea is full of water.” (Source: Hiligaynon Back Translation)