[TheCoelacanth]

There's a two-hundred year gap been it bring composed to capturing it in written form. It was in oral form and didn't written down (outside of some short fragements) for the ~200 year.

When the The Odyssey was composed, widespread use of digamma sound was still a big thing.

I can easily believe that anachronistic language was added in the process of writing them down, but the original audience wasn't people reading in a book; it was people who were listening to a poem that had never been written down.

There is a huge amount of anacronistic content, but when it was first performed, language was relatively contemporary at the start.