Following are a number of back-translations as well as a sample translation for translators of Proverbs 21:24:

• Kupsabiny: “A person who boasts of himself and despises (people) is bad/arrogant.” (Source: Kupsabiny Back Translation)
• Newari: “One who keeps on criticizing others
  is an arrogant and obstinate person.
  There is no limit to their boasting.” (Source: Newari Back Translation)
• Hiligaynon: “The proud and arrogant/[lit. the-(ones-who)-thinks-high] man you will-know for he mocks, and he boasts too much.” (Source: Hiligaynon Back Translation)
• Kankanaey: “The one who is a mocker and is-proud (lit. makes-high his body), people say that he is arrogant.” (Source: Kankanaey Back Translation)
• English: “Those who make fun of everything that is good are proud and conceited ;
  they always act in an inconsiderate way toward others.” (Source: Translation for Translators)