Dear List,
I answer to myself (or I give a solution to the problem I have to face).
As for this precise case (i.e. having multilanguages in the same
document with French as main language, with some words, sentences or
whatever in Ancient Greek, Chinese and Arabic/Persian/Farsi), the
working
Dear List,
Working with ConTeXt MK IV version 2016.07.18, I need sometimes within a
text in French I am working on, some Greek words or sentences, rarely
Chinese and Arabic words, mainly names and a few words.
Then, I use this general preamble (thanks to Pablo Rodriguez):