Following are a number of back-translations as well as a sample translation for translators of Proverbs 25:15:

• Kupsabiny: “If/When one speaks good words, (it) appeases people, but/and if one perseveres (it) brings back/corrects even a king.” (Source: Kupsabiny Back Translation)
• Newari: “If there is patience even a ruler can be placated.
  and by soft words even bones can be softened.” (Source: Newari Back Translation)
• Hiligaynon: “Being-patient and a gentle speaking can-persuade the ones-who-rule and even the ones-who have a hard heart.” (Source: Hiligaynon Back Translation)
• Kankanaey: “If you (sing.) are patient and your (sing.) words are slow/soft, you (sing.) can cause- the ruler -to-give-in and defeat the strongest who opposes.” (Source: Kankanaey Back Translation)
• English: “If someone keeps requesting a ruler long enough to do something, he will often agree to do it;
  similarly, by speaking gently we can often convince others that what we say is right.” (Source: Translation for Translators)