Following are a number of back-translations as well as a sample translation for translators of Ezekiel 30:8:

• Kupsabiny: “Then surely is when they will know that I am God when I set fire to Egypt and crush those who came to aid them.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “When I will- now -burn Egipto and all who allied with her will-die, her residents will-know that I am the LORD.” (Source: Hiligaynon Back Translation)
• English: “Then, when I cause everything in Egypt to be burned in fires,
  and all their allies are defeated,
  people will know that I, Yahweh, have the power to do what I say that I will do.” (Source: Translation for Translators)