Following are a number of back-translations as well as a sample translation for translators of Deuteronomy 33:5:

• Kupsabiny: “God became the king of Israel
  when the leaders gathered
  and all the clans met.’” (Source: Kupsabiny Back Translation)
• Newari: “When the tribes of Israel
  gathered leaders of the people in one place,
  the LORD became the King of Jeshurun."” (Source: Newari Back Translation)
• Hiligaynon: “The LORD became king of Israel when their leaders and their tribes had-gathered.’” (Source: Hiligaynon Back Translation)
• English: “So Yahweh became the king of his Israeli people
  when all the tribes and their leaders were gathered together.” (Source: Translation for Translators)