Following are a number of back-translations as well as a sample translation for translators of Psalm 138:4:

• Chichewa Contempary Chichewa translation, 2002/2016:
  “Let all the kings of the earth thank you Jehovah,
  when they have heard the words of your mouth.” (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)
• Newari:
  “Having heard Your word, O LORD,
  let all the kings of the earth give thanks.” (Source: Newari Back Translation)
• Hiligaynon:
  “All kings of the whole world will-praise you (sing.), LORD,
  for they will-hear your (sing.) word.” (Source: Hiligaynon Back Translation)
• Laarim:
  “LORD, would you let all the kings of the earth to praise you,
  when they hear the words of your mouth.” (Source: Laarim Back Translation)
• Nyakyusa-Ngonde (back-translation into Swahili):
  “Ee BWANA, wafalme wote duniani wawe wanakusifu,
  kwa sababu wamesikia maneno yako.” (Source: Nyakyusa Back Translation)
• English:
  “Yahweh, some day all the kings of this earth will praise you,
  because they will have heard what you have said.” (Source: Translation for Translators)