Following are a number of back-translations of John 7:15:

• Uma: «The Yahudi rulers were surprised to hear his teaching, they said: ‘How does he know the contents of the Holy Book, since he is not even educated?'» (Source: Uma Back Translation)
• Yakan: «The leaders of the Yahudi marveled very much at the teaching of Isa. They said, ‘This person, surprise, has not studied. Where did he get this his knowledge from?'» (Source: Yakan Back Translation)
• Western Bukidnon Manobo: «The Jewish leaders were very surprised at him, and they said, ‘Where do you suppose this person’s wisdom comes from, because he hasn’t studied a lot.'» (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: «And that’s when/how the leaders of the Jews were surprised saying, ‘Where did this-one get his intelligence/wisdom, because he is definitely not an educated person?'» (Source: Kankanaey Back Translation)
• Tagbanwa: «The Judio were amazed. They were saying, ‘Where does the knowledge of this fellow come from since he hasn’t had schooling?'» (Source: Tagbanwa Back Translation)
• Tenango Otomi: «The Jews were amazed at the word Jesus taught. They said, ‘Where did he get all that which he speaks? We haven’t seen him going to school.'» (Source: Tenango Otomi Back Translation)