Following are a number of back-translations as well as a sample translation for translators of Lamentations 3:28:

• Kupsabiny: “Let him be quiet and persevere
  because God is the one who brought those matters.” (Source: Kupsabiny Back Translation)
• Newari: “Let him sit alone in silence,
  when the LORD has put sorrow on him.” (Source: Newari Back Translation)
• Hiligaynon: “When the LORD disciplines us (incl.) let- us (incl.) -sit alone and meditate.” (Source: Hiligaynon Back Translation)
• English: “Those who seek his help should sit by themselves, silently,
  knowing that it is Yahweh who has allowed/caused them to suffer.” (Source: Translation for Translators)