Following are a number of back-translations as well as a sample translation for translators of Jeremiah 46:23:

• Kupsabiny: “(They) will fell the forest defeating (it)
  even though that forest is very closed/dense!
  Those enemies are amazingly many
  and they are thronging/swarming like grasshoppers.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “They will-kill those from-Egipto as-if they are-cutting-down trees that are-healthy/has-thick-leaves. These enemies are even-more numerous than locusts; they can- not -be-counted.” (Source: Hiligaynon Back Translation)
• English: “I, Yahweh, say that they will kill the soldiers of Egypt
  as though they were a forest of trees,
  because the enemy soldiers will be as numerous as a swarm of locusts.” (Source: Translation for Translators)