Following are a number of back-translations as well as a sample translation for translators of Isaiah 61:3:

• Kupsabiny: “He sent me to give (gifts) to those who mourn in Zion,
  (for them) to rejoice instead of feeling pain.
  They shall get a song of praising
  instead of crying.
  They shall get a hat (crown) of happiness
  instead of being without hope.
  They shall become big and righteous trees
  trees that God plants so that he can be exalted.” (Source: Kupsabiny Back Translation)
• Newari: “and to provide to those who are mourning in Zion
  to put a very beautiful crown
  instead of ashes
  and [he] will put the oil of rejoicing instead of mourning.
  [He] To clothe [you] with praise instead of broken heart.
  That his glory might be seen
  they will be called oaks trees of righteousness that the LORD has planted.” (Source: Newari Back Translation)
• Hiligaynon: “He also sent me to proclaim that this is now the time that the LORD will-save his people and punish their enemies. He even sent me to comfort the ones-who-are-mourning in Jerusalem, so-that instead they will-put ash on their head to show that they are-mourning, they will-put a crown-like flower on their head or they will-rub their heads with oil, to show that they are happy. They will-be like a strong oak tree, which was-planted by the LORD. They will-be-called righteous for the honor of the LORD.” (Source: Hiligaynon Back Translation)