Rather odd request for a coin collectors' site..... but here's my guess: It's some fantasy language that the sword's maker cooked up to make it look like something out of a Tolkien novel.
Unless I'm wrong, which I very possibly could be.... in which case it looks like Greek mixed with Hebrew.
Tengwar https://en.wikipedia.org/wiki/Tengwar
either your photos are reversed, or the inscription is mirrored.
viewed like this I can find every single character in this chart.
transcribing "anestarh adhathangichathol henthadaroddanithangani aron"
I was a Tolkien geek, but not enough to tell you if this means anything in Sindarin.
Jamais l'or n'a perdu la plus petite occasion de se montrer stupide. -Balzac
I saw a very similar sword around 6 months ago, I think it was the same script. I entered the shop to ask about it but the owner didn't knew what was written.
Now I have a answer. Thanks midnight cat.