Following are a number of back-translations of John 15:26:

• Uma: “‘The Holy Spirit will come, meaning, the Spirit that appears from God and who will lead you in the true teaching. He will be the Helper that I order to come here to you from my Father. When he comes, he will be my witness.” (Source: Uma Back Translation)
• Yakan: “‘The helper will come to you. This helper is the Spirit of God and he is from my Father. He teaches the truth about God. I will send him to you from my Father and when he is here, he will witness to/about me.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “Then Jesus said again, ‘The helper which comes from my Father, I will send him here to you. He is the Holy Spirit who teaches the true doctrine. And when he comes here to the earth he will cause people to understand who I am.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “Then Jesus continued to say, ‘In-the-future I will send to you the Spirit who will come-from my Father to help you. It is he who will confirm/verify the truth concerning me.” (Source: Kankanaey Back Translation)
• Tagbanwa: “But when the Helper arrives here whom I will cause to come here coming from the Father, he will testify for me. He, this Espiritu Santo, is the one whose job is to make you know the truth and is sent by my Father.” (Source: Tagbanwa Back Translation)
• Tenango Otomi: “I will ask the Father to send the Holy Spirit. When he comes he will help you and comfort you. He will testify as to who I am.” (Source: Tenango Otomi Back Translation)