Following are a number of back-translations as well as a sample translation for translators of Isaiah 17:6:

• Kupsabiny: “A few people shall remain.
  Israel shall become like an olive tree
  when its fruits have been plucked
  so that only two or three remain
  in the height/up/top,
  and few remain,
  on the branches that are down.’” (Source: Kupsabiny Back Translation)
• Newari: “After harvest as [when] only two or three [pieces of] fruit remain on the top branches of an olive tree and
  [with] only four or five pieces of fruit remaining on the lower branches,
  Israel will be like a naked olive tree, and its few people will be left,"
  the LORD, Almighty God of Israel say’s like this.” (Source: Newari Back Translation)
• Hiligaynon: “Only few will-be-left of her people. Just like an olive tree after its fruits had-been-harvested: only two or three fruits will-be-left on the highest branches; only four or five fruits on other branches. I, the LORD Almighty, (am) the-(one) saying this.’” (Source: Hiligaynon Back Translation)