Following are a number of back-translations as well as a sample translation for translators of Jeremiah 50:15:

• Kupsabiny: “Shout loudly from all sides,
  they have put the hands up as they are defeated
  and the wall has fallen and/with where they defended themselves from.
  I am God the one who am taking revenge,
  so, you pay back by doing to them also
  like they did to other people.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “Shout against her from all direction. Look! Babilonia has- now -surrendered! Her towers have- now -fallen-down and her walls are-torn-down. This is a vengeance of the LORD against her, so you (plur.) take-vengeance on her and do to her what she has-done to other(s).” (Source: Hiligaynon Back Translation)