Following are a number of back-translations as well as a sample translation for translators of Deuteronomy 33:15:

• Kupsabiny: “Let them get food of the old mountains
  and much food from the mountains of forever.” (Source: Kupsabiny Back Translation)
• Newari: “May He give them the offerings of the very old mountains that are liked most of all,
  and the precious provisions of the eternal mountains.” (Source: Newari Back Translation)
• Hiligaynon: “May-it-be that their mountains in ancient times will-produce well/[lit. good] and abundant fruits.” (Source: Hiligaynon Back Translation)
• English: “I desire/hope that very nice fruit will grow on trees in their ancient mountains/hills ,” (Source: Translation for Translators)