Following are a number of back-translations as well as a sample translation for translators of Isaiah 11:15:

• Kupsabiny: “God shall dry up the sea of Egypt
  and dry out with a wind the river Euphrates.
  (He) shall divide that river into seven streams
  so that people can cross over.” (Source: Kupsabiny Back Translation)
• Newari: “The LORD will cause the depths of the sea of Egypt to dry up.
  With a hot wind he will move his hand along [lit. in] the Euphrates River.
  And [he] will divide it into seven small rivers.
  And from then on anyone will be able to pass over by walking.” (Source: Newari Back Translation)
• Hiligaynon: “The LORD will-dry-up the Sea of Egipto, and he will-send a scorching wind to the Eufrates River so-that this will-become into seven small [plural marker] place(s)-where- water -flows that can-be-crossed-over by a man by walking only.” (Source: Hiligaynon Back Translation)
• English: “Yahweh will make a dry road through the sea near Egypt.
  And it will be as though he will wave his hand over the Euphrates River
  and send a strong wind to cause it to divide into seven streams,
  with the result that people will be able to walk across those streams.” (Source: Translation for Translators)