There have been many Coptic versions of the Bible, including some of the earliest translations into any language. Several different versions were made in the ancient world, with different editions of the Old and New Testament in five of the dialects of Coptic.
The earliest translations of the Christian Greek Scriptures were into Syriac, Latin, and Coptic. As Christianity spread, of course, other versions would have been required. Even though Greek was very much used in Egypt, in time, the need to have a translation in the native language of the growing Egyptian Christian population would come.