Following are a number of back-translations of Acts 17:31:

• Uma: “For he has made-certain one time later to decide/judge the cases of people all over the world justly. That work of deciding he has handed over to a person whom he chose ahead of time. That person he caused to live again from death, so that it would be clear to all mankind that he is indeed the one he chose to be the Judge of all mankind.'” (Source: Uma Back Translation)
• Yakan: “For God has already appointed the day when he will judge all mankind, and his judgment is straight. And he has already chosen the man who will judge. God has-made-certain-to/assures all mankind that he is the one he has chosen, in that he made this man alive again from his death.'” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “He has set a day in the future upon which he will inspect all of mankind, and his inspection will be righteous also by means of the person whom he has chosen. He has shown that this which he will do is true because as for that person, he died and God raised him from the dead.'” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “Because there is a day that God has designated when-he-will-judge all people in the world. There is also a person whom he chose to properly judge them, and he confirmed that he is the one whom he chose by-means-of his bringing-him -to-life again.'” (Source: Kankanaey Back Translation)
• Tagbanwa: “For he has already determined the day when he will judge all people for their sins. There is a person whom he has set up to do the judging, and this judging of his is just/righteous. The proof that he is the one set up by God is, he died and then God made him alive again.'” (Source: Tagbanwa Back Translation)
• Morelos Nahuatl: “Thus God wants that we repent because he set apart a day in order that all people be before him. He chose a man named Jesus in order that on that day which God set apart Jesus would say which people are good and which people are bad. God chose Jesus for that work because Jesus says only what is true. God made Jesus alive from the dead ones and in that way he showed us that he chose Jesus for that work.”
• Teutila Cuicatec: “He has already established a day when he will judge with complete fairness all the people of the world. He has already chosen a man who will judge in his stead and he raised that person back to life from among the dead’. By this he has given all people to understand that this is how things are established.”
• San Mateo del Mar Huave: “‘For Father God has appointed a day in which to judge all the people of the world. That will be when Jesus will judge. For that reason Father God, when he raised Jesus from the dead, then it was manifested that it was the truth all that he had said that he would do.’ he says.” (Source for this and two above: Viola Waterhouse in Notes on Translation August 1966, p. 86ff.)