score:7
Currently, 150 million+ copies in any of 82 languages. (from the Mormon Newsroom)
Since it was first published in English in 1830, the Book of Mormon has been fully translated into 82 languages, and printed copies have totaled more than 150 million.
I'll add a note that I've seen at least a dozen incomplete translations ("Selections from the Book of Mormon") into more obscure languages. Interestingly, I have also met people who, for existing translations, are assisting in making better translations for difficult languages like Farsi where current translations are lacking.
This page on the LDS Store has 37 languages in the list for the Triple Combination, which includes the Book of Mormon, Doctrine and Covenants, and Pearl of Great Price.
As a side, here's an interesting article about the publishing of the Book of Mormon.