Following are a number of back-translations as well as a sample translation for translators of Psalm 40:9:

• Chichewa Contempary Chichewa translation, 2002/2016:
  “I am preaching the message of your righteousness in the great assembly;
  I do not close my lips
  as you know You Jehovah.” (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)
• Newari:
  “O LORD, I have proclaimed to everyone in the great council
  that You are the one who saves us.
  You certainly know that I will never refrain from proclaiming this.” (Source: Newari Back Translation)
• Hiligaynon:
  “I tell-(about) your (sing.) saving me in the gathering of your (sing.) people.
  You (sing.) know, LORD, that I do- not -stop telling this.” (Source: Hiligaynon Back Translation)
• Eastern Bru:
  “You already know that before the eyes of all the people who gather to worship you I have already told of God’s saving us. About those things I don’t close my mouth.” (Source: Bru Back Translation)
• Laarim:
  “I tell your goodness in a large crowd,
  I do not shut my mouth,
  LORD, as you also know.” (Source: Laarim Back Translation)
• Nyakyusa-Ngonde (back-translation into Swahili):
  “Nimetangaza matendo yako ya wokovu,
  katika mkutano wa watu wengi.
  Ee Bwana, unajua,
  sinyamazi kuhubiri.” (Source: Nyakyusa Back Translation)
• English:
  “Whenever all your people are gathered,
  I have told them about how you save us.
  Yahweh, you know that I have not been afraid to tell that to them.” (Source: Translation for Translators)