Huh, good question. I remember a forward in the book about the difference translations, but I will admit that was back in middle school. I still have the book. Perhaps I’ll try to dig it up tomorrow.
I did however find a new translation online that sounds interesting. I remember all the scientific names suuuucked back then and even my copy said something along the lines of “abridged for sake of brevity” on one of his journal entries. Even my translation noped out of that.