Following are a number of back-translations as well as a sample translation for translators of Jeremiah 46:8:

• Kupsabiny: “This is the land of Egypt that overflows like the river Nile,
  like rivers that overflow until they flood the land.
  (It) says, ‘I swell up to cover the land,
  and I destroy cities and people who live there.’” (Source: Kupsabiny Back Translation)
• Hiligaynon: “That is Egipto; it becomes-powerful like a River of Nile that the water rises-up till the bank. Egipto said, ‘I am becoming-powerful and became like a flood that will-cover the earth. I will-destroy the cities and its people.’” (Source: Hiligaynon Back Translation)
• English: “It is the army of Egypt
  that will be covering the land like a surging/huge flood,
  and they will boast that they will cover the earth
  and will destroy cities and the people who live in them.” (Source: Translation for Translators)