@In-Feara
I've put it through pyglossary to transform it into Stardict-format. After that I put that through the script to generate xdxf-format and pocketbook dic-format. The results are
here.
I can't test it anymore, since my Pocketbook went back to Amazon.de. I haven't found configuration files for the Greek language, so morphemes and keyboard are for english. (So it could be hard to manually input search terms and it won't recognize conjugations.)
Still, I hope it is useful. Let me know!