Following are a number of back-translations as well as a sample translation for translators of Isaiah 14:30:

• Kupsabiny: “I am God who will become a shepherd of my weak people
  and I shall make those people stay in a guarded place.
  But I shall send you Philistines a fierce famine,
  so that not even one person shall be left.” (Source: Kupsabiny Back Translation)
• Newari: “Caring for the poor, the poor will get to graze in the field,
  feeling secure, the needy will get to take rest.
  But your lineage I will destroy by giving [it] no chance to eat [lit.: by causing [it] not to get to eat].
  And none of you will survive from that [lit.: be caused to stay alive].” (Source: Newari Back Translation)
• Hiligaynon: “I will-take-care my people who are poor and have- them -rest that no one can-harm them. But I will-kill your (plur.) descendants by famine. And those who-will-be-left among them I will- also -kill.” (Source: Hiligaynon Back Translation)
• English: “Those of my people who are very poor will take care of their flocks of sheep,
  and the needy people will lie down safely,
  but I will cause you people of Philistia who are still alive
  to die from famine.” (Source: Translation for Translators)