Nope, some of the mistakes were fixed for the Japanese edition which was published a few months after the English one. Koji has addressed some of the errors in this thread or in interviews, but I honestly wouldn't expect any changes to the print version until/unless we get a second edition (i.e one updated after Stormblood's patches are complete). Even with the errors I still love my Encyclopedia. There are only a few that really stand out when reading it; most of them are fairly minor, such as spelling. Mistakes in these sort of books aren't uncommon-- Bioware's World of Thedas Vol. 1 is a bit infamous in the online fandom for its errors.
