Local dialects, many translations over the years, the development of words and language along with their meaning changes over the years.
Translating it itself would have been difficult, and then translating it into differing languages through two different eras - say 100 years apart may well give you a different book, as well as any political or power games played by those involved.
Not forgetting that the Bible is a collection of stories from many different people with differing points of view from a range of varying eras.
Bible rant over...
