None whatsoever, but as seen in the video it's a Chinese Officer Sword, which are prevalent in Fallout 3. But yes, it's a perfectly legitimate reason to criticize the reference to say that it doesn't fit thematically. But how many references in Fallout 2 fit in thematically? They don't necessarily have to. But back to the original point, that still doesn't have anything to do with you or me liking or not liking Dark Souls, does it?