Following are a number of back-translations of Revelation 16:14:

• Uma: “And I saw an evil-spirit appear from the mouth of a dragon. Another one also appeared from the mouth of the evil animal, and another one also appeared from the mouth of the lying prophet. Those three evil-spirits, they were demons that looked like frogs, and they had power/authority to do surprising signs. Those three evil-spirits went to call kings from all over the world. They called them to come gather and fight at the time of the Terrifying Day, that is the time when the powerful God defeats all his enemies on earth.” (Source: Uma Back Translation)
• Yakan: “Those souls/spirits are demons, they do amazing deeds. They will go to the kings in the whole world, telling them to gather so that they will fight on the day that the Most-Powerful God has ordained, that is the most frightening day.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “These are demons who have power to do miracles. They are sent to gather together the soldiers of all the kings on the earth, because on the famous day of punishment they will fight against God, the Lord of all.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “These spirits, they were demons who had ability to do miracles, and they went and gathered those who ruled in all countries on the earth in order that they would go wage-war-against the Lord God who is all powerful on his great (lit. valuable) day.” (Source: Kankanaey Back Translation)
• Tagbanwa: “Those evil-spirits were producers of amazing things. And what they did was, they went all over the whole world, for they went to get all the kings to join them in fighting God who has surpassing supernatural-power on that far-from-ordinary day when he would judge.” (Source: Tagbanwa Back Translation)
• Tenango Otomi: “These are evil spirits which can do miracles. They came out in order to go and gather all the rulers who live on earth so that on the day God who has all power comes to judge all people, then they would arise and make a big war with God.” (Source: Tenango Otomi Back Translation)