Following are a number of back-translations of Acts 1:7:

• Uma: “Yesus said: ‘My Father himself is the one who sets when will be fulfilled all his purposes that he has established by his authority/powerb [kuasa]. It is not necessary for you to know.” (Source: Uma Back Translation)
• Yakan: “He answered, he said, ‘You don’t have/are not supposed to know about those (things). My Father is the only one who decides/rules over the happenings in the world and when he will let them happen.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “And Jesus answered, ‘It is only our Father God who has power to know at which time the things which he does will be fulfilled, and it is not permitted to you to know this.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “‘It is not possible for you to come-to-know that, because my Father only has the authority to designate (lit. sentence/convict) what will happen in a future day (lit. addition of days) and when it will happen,’ said Jesus answering.” (Source: Kankanaey Back Translation)
• Tagbanwa: “Jesus replied to them, ‘Only my Father knows at what time or hour he will fulfill all which he has determined. As for you, it’s not possible/acceptable for you to know these things.” (Source: Tagbanwa Back Translation)
• Desano; “These things are not for you to know. Only God the Father knows what he is going to do by his power, and the day when he is going to do it.”
• Teutila Cuicatec: “Jesus answered them: ‘It is none of your concern to know on what day or at what hour what God the Father himself has established will be fulfilled.'”
• San Mateo Del Mar Huave: “Father Jesus said to them: ‘You do not need to know when or what hour that will be because only Father God knows when he will cause that to be.'” (source for this and two above: Viola Waterhouse in Notes on Translation August 1966, p. 86ff.)