Well, there was this:
https://www.mobileread.com/forums/sh...4&postcount=13. But apparently it was copyrighted still. Maybe try to find something similar.
I found this:
https://aur.archlinux.org/packages/stardict-oed (download the two files from Sources).
Or just search for stardict dictionaries. Here are some from Wiktionary:
https://github.com/Vuizur/Wiktionary-Dictionaries
Here are some monolingual ones:
https://github.com/BoboTiG/ebook-reader-dict
If you need inflection support, consider using Goldendict. Then install any stardict dictionaries that you like + hunspell dictionaries for the languages you need (e.g. English and French).