[roger64]

Thanks for your handy list and your advices.

If I spoke about this random Greek quote, it's because I had a book with two short Greek words. I used embedded fonts in this book (subsets of) and did not want to add a special Greek font only for this purpose.

The plain: ,serif coupled with the ISO codes (html codes are OK too) did the trick (at least for Sigil, calibre, ADE, Kobo...). This seems to work.