Following are a number of back-translations as well as a sample translation for translators of Isaiah 42:15:

• Kupsabiny: “Mountains and hills will be destroyed
  and the things that grow there will dry up.
  I shall turn rivers to become dry land,
  and made ponds/wells lose water and dry up.” (Source: Kupsabiny Back Translation)
• Newari: “I will destroy the mountains and hills,
  I will cause the plants to become dry.
  I will change the rivers into islands,
  and I will turn the ponds into dry ground.” (Source: Newari Back Translation)
• Hiligaynon: “I will-destroy the mountains, and cause-to-wither the plants. I will-turn the rivers into dry land and the pool-of-waters I will-cause-to-become-dry.” (Source: Hiligaynon Back Translation)