User blog comment:Xilinoc/Ch. 570 (I can't think of a witty title at 11 pm)/@comment-1904799-20140226185805/@comment-8669536-20140226190223

Considering Äs' name I'd guess he's either German or Swedish and not English-speaking (because the letters Ä and Ö exist in those languages), and at least in Swedish Bible is spelled as Bibel and I Think it's spelled the same in German.

Though German is actually likelier considering the book's title in Swedish would be "Bibeln" (The Bible).