Following are a number of back-translations of John 21:25:

• Ojitlán Chinantec: «If all that he did should be written, I am of the opinion that the books wouldn’t even all fit in the whole world here.»
• Huehuetla Tepehua: » . . . If all of them, all things were all written, no doubt they wouldn’t be able to be contained in this world, the writings where it was written what Jesus did.»
• Aguaruna: «But writing each one, there wouldn’t be a place to put the paper here in this world.»
• Yatzachi Zapotec: «If all of them were written one by one, there would be an extremely great number of books.» (Source for this and above: M. Larson / B. Moore in Notes on Translation February 1970, p. 1-125.)
• Uma: «There are still many other [things] that Yesus did. If for example everything that he did was written in books, I think that even if the whole world were-used-to-store-them-in, they probably could not fit, because there would be very many books.» (Source: Uma Back Translation)
• Yakan: «Isa has done very many other deeds that are not written. If they were all written in a holy-book, I figure all the holy-books that would have to be written would not fit here into the world.» (Source: Yakan Back Translation)
• Western Bukidnon Manobo: «Jesus did many other things. If all of them were written down, even the whole world would not be big enough to hold the books that would be written.» (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: «There are admittedly many more-things that Jesus did. If they were all to be written, even the entire world, it would perhaps not be-able-to-contain the many-books in which they were written.» (Source: Kankanaey Back Translation)
• Tagbanwa: «There are other and many more things which Jesus did. Supposing they were all written, I am sure that the whole world which is here under the heavens wouldn’t be able to contain the number of books in which they would be written.» (Source: Tagbanwa Back Translation)
• Tenango Otomi: «Jesus did many other things which if I had written down on paper each one, I suppose the earth wouldn’t hold the books that I would have written.» (Source: Tenango Otomi Back Translation)