Crimson Rivers 2: Angels of the Apocalypse (2004)

Factual error: Marie discovers that letters in a 9th century ornament are actually Arabic numerals. Those were not introduced into Europe until the 13th century and although the numbering system was already in use in Arabia, it used different glyphs than the ones she identified.

Reda: You still never told me.
Commissaire Niemans: What?
Reda: The name of your dog.
Commissaire Niemans: I found an interesting name, a dangerous dog's name.
Reda: For a Yorkshire?
Commissaire Niemans: Yes, I called him... Reda.