Following are a number of back-translations as well as a sample translation for translators of Psalm 139:17:

• Chichewa Contempary Chichewa translation, 2002/2016:
  “Your meditations on me are of high price, You God,
  (they) are surely countless!” (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)
• Newari:
  “O God! How precious are Your thoughts,
  and how many there are / how great their number.” (Source: Newari Back Translation)
• Hiligaynon:
  “O God, I can- not -fathom your (sing.) thoughts;
  these (are) so great-in-number.” (Source: Hiligaynon Back Translation)
• Laarim:
  “God, your thoughts about me are many and very important!
  More than I can think!” (Source: Laarim Back Translation)
• Nyakyusa-Ngonde (back-translation into Swahili):
  “Ee Mungu, ambayo unawaza ni ya juu sana kunipita mimi,
  siwezi kuelewa.” (Source: Nyakyusa Back Translation)
• English:
  “God, what you think about me is very precious (OR, is very hard to understand).
  There is a great number of things that you think about.” (Source: Translation for Translators)