I believe it is ancient, the way I remember the texts, the false etymologies of words and names are present even in the Bible. People always loved the stories about how why something is named something, even when the story is false, if it's good, it will be repeated. We are all storytellers.
Exactly because I know "the story of sashimi" that word is for me jarring in Beowulf. It's not only anachronistic for the setting where the story takes place, it is also from the wrong part of the world, implying today's global trade of culinary fashion to that time and place:
"skinny-dipping in a sleeping sea
and made sashimi of some sea monsters."
That's exactly what I mean. Pre-modern etymology was different than it is now. For example, the ancient greeks weren't interested in tracing a word back to some geographic-historical commodity. They were interested in tracing a word back to the source of its own meaning (which they often traced back to the gods), whereas for you, the meaning of a word is just the geographic-historical roots of its signified or whatever.
Can that be argued? It's not that the "contact" and influence didn't exist, it's just that these specific people wouldn't use that language at that moment of time. The Romans were already on English ground long before Beowulf was written so using Latin words there is still much more acceptable to me -- it doesn't imply some access or historical impossibility that didn't exist.
The same can't be said about sashimi. Again, like in the example of the movies (in other messages), I'm simply not expecting absolute purity, I just find Seiko watches too distracting there.
It is not a Latin word, it is a word from Old French which is a Romance language evolved from Vulgar Latin. A lot of words from Old French entered English after the Norman conquest. This is the major difference between Old English (the language of Beowulf) and Middle English.
You may not care about any of that, but my point is a translation into modern English is by definition anachronistic. Avoiding 20th century loanwords like sashimi will not make it authentic, at best it will make the text feel slightly old fashioned, but it would still be wholly anachronistic.
I believe it is ancient, the way I remember the texts, the false etymologies of words and names are present even in the Bible. People always loved the stories about how why something is named something, even when the story is false, if it's good, it will be repeated. We are all storytellers.
Exactly because I know "the story of sashimi" that word is for me jarring in Beowulf. It's not only anachronistic for the setting where the story takes place, it is also from the wrong part of the world, implying today's global trade of culinary fashion to that time and place: