Following are a number of back-translations as well as a sample translation for translators of Nahum 1:12:

• Kupsabiny: “God is now saying, ‘Although there are many soldiers and they have power, they shall be destroyed completely! Stomach of Judah, although I have punished you, I shall never do like that again.” (Source: Kupsabiny Back Translation)
• Newari: “This is what the LORD says,
  "Even though the Assyrians are strong and many in number,
  they will be destroyed and will cease to exist.
  O Judah, I have given you trouble,
  But now I will not give you trouble again.” (Source: Newari Back Translation)
• Hiligaynon: “This is what- the LORD -is-saying to those from-Juda: ‘Even-though your (plur.) enemies from-Asiria are many and strong, I will-destroy them until they will-be-gone/lost. Even-though (it is) true that I had-caused- you (plur.) -to-suffer I will- no-longer -do that again.” (Source: Hiligaynon Back Translation)
• English: “But this is what Yahweh says about you Israeli people:
  ‘Although the people of Assyria have very many people and their army is very powerful,
  they will be destroyed and will disappear.
  I say to my people in Judah,
  ‘ have already punished you,
  but I will not punish you again.” (Source: Translation for Translators)