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

• Kupsabiny: “A poor person feels defeated every day,
  but the one who has enough things is always happy.” (Source: Kupsabiny Back Translation)
• Newari: “It is always difficult for the poor to survive,
  But for those who are content
  there is always a feast.” (Source: Newari Back Translation)
• Hiligaynon: “The life of the poor is always hard, but if they will- just -be-content they will- always -be very happy.” (Source: Hiligaynon Back Translation)
• Kankanaey: “Every-day the life of a unfortunate/pitiable-person is difficult, but the happy person, he continually enjoys his life.” (Source: Kankanaey Back Translation)
• English: “Those who are oppressed constantly have difficulties,
  but those who (OR, if they) are happy, it is as though they are having a big feast every day.” (Source: Translation for Translators)