Following are a number of back-translations of Revelation 16:9:

• Uma: “People/mankind were burned from its blazing/intense shining, and they cursed God, because he was the one who had power/authority over that torture. They still did not repent from their sins, they still did not admit/confess the bigness of life [glory] of God.” (Source: Uma Back Translation)
• Yakan: “Mankind/the people were burnt because the sun was so very hot. Therefore they spoke-evil-about/insulted God because he was the one who sent those disasters. But they did not regret and leave their sins and they also did not praise God.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “And since people were burned by the strong heat, they spoke in rejection against God because He was in control of their being tormented. But they did not give up their evil deeds, neither did they honor God.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “But even though they were burned by that-aforementioned fearful heat, they didn’t repent of their sins to praise/worship God koma who was responsible for those fearful hardships, but rather they spoke-evil-of his name.” (Source: Kankanaey Back Translation)
• Tagbanwa: “Well what else but the people truly were heated through, because the heat really was intense, therefore they spoke-harshly-of God who had set in motion that suffering. They really determined that they would not repent and give up their sins and they wouldn’t praise God.” (Source: Tagbanwa Back Translation)
• Tenango Otomi: “the people very much were burned from the heat of the sun. Yet they did not want to turn their hearts to let themselves praise God. Rather even more they spoke against God, he who has the power for sending the suffering they were going through.” (Source: Tenango Otomi Back Translation)