Following are a number of back-translations as well as a sample translation for translators of Jeremiah 51:20:

• Kupsabiny: “God is saying,
  ‘Babylon, you are my hammer
  my metal/weapon of war.
  I used you to beat the nations
  and their kings.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “The LORD said, ‘You (sing.) are my something-to-hit, my weapon in battle. Through you I will-destroy the nations and the kingdoms,” (Source: Hiligaynon Back Translation)