Host Martin Tanner explains why the words "Jesus" "Messiah" "Baptism" and "Bible" are not anachronisms and are perfectly fine translations of the ancient words on the Golden Plates from which the Book of Mormon was translated. A translation is rendering a word or phrase and its their meaning in one language, into a word or phrase in another language, which carries the same meaning, as much as possible. Since Christians believe "Jesus" was the God of the Old Testament, the word "Bible" properly conveys the idea of authoritative religious writings, even pre-Christian ones, and "Baptism" properly conveys the pre-Christian idea of ritual cleansing of sin by immersion in water, these are all proper words to find in the pre-Christian parts of Book of Mormon.