Following are a number of back-translations as well as a sample translation for translators of Isaiah 14:25:

• Kupsabiny: “I shall destroy the soldiers of Assyria
  in my land of Israel.
  I shall trample on those people in the mountain
  and release my people from those Assyrians,
  to get them out from oppression and fierce persecution.” (Source: Kupsabiny Back Translation)
• Newari: “I will destroy the Assyrians in my land.
  I will trample them on my mountain with the sole of [my] foot,
  From the Assyrian yoke and from the loads that they carry,
  [I] will set my people free.” (Source: Newari Back Translation)
• Hiligaynon: “I will-destroy those of/from-Asiria if they are in Israel my land. I will-trample- them -down on my mountains. They will- no-longer -enslave my people.” (Source: Hiligaynon Back Translation)
• English: “When the army of Assyria is in my land of Israel,
  I will crush them.
  It will be as though I will trample them on my mountains.
  My people will no longer be the slaves of the people of Assyria;
  it will be as though I will take away the burdens that are on their shoulders.” (Source: Translation for Translators)