Following are a number of back-translations as well as a sample translation for translators of Jeremiah 49:28:

• Kupsabiny: “These are words about the community of Kedar and that of Hazor that king Nebuchadnezzar of Babylon fought against. God said,
  ‘Get up (plur.) and go to fight against the people of Kedar!
  Destroy these people of the East.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “This is what the LORD has-said concerning Kedar and to the kingdoms of Hazor that King Nebuchadnezzar of Babilonia attacked:
  ‘[You (plur.)] prepare and you (plur.) attack Kedar! [You (plur.)] destroy this people in the east!” (Source: Hiligaynon Back Translation)
• English: “This is a message about the Kedar people-group and the kingdom of Hazor which the army of Nebuchadnezzar King of Babylon attacked. This is what Yahweh says:
  ‘I will cause an army to advance to attack Kedar
  and destroy those people who live east of Judah.” (Source: Translation for Translators)