Following are a number of back-translations as well as a sample translation for translators of Proverbs 27:9:

• Kupsabiny: “Words that your friend advises you with are sweet,
  like oil/perfume that smells sweet.” (Source: Kupsabiny Back Translation)
• Newari: “The heart feels pleased
  by the fragrance of incense and perfume.
  but a relationship with a good friend
  is even more fragrant.” (Source: Newari Back Translation)
• Hiligaynon: “As perfume and incense can-give-joy to a person, a sincere advise of a friend can-give-joy also.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Oil and perfume cause-one-to-be-happy, but even-more-so the advice of a loyal friend.” (Source: Kankanaey Back Translation)
• English: “Putting olive oil and perfume on a person’s skin causes him to feel good,
  but having a friend who gives good advice is even better.” (Source: Translation for Translators)