I don't know whether the following page will answer your question or not:
http://eyegene.ophthy.med.umich.edu/unicode/#fonts
Note: This page does not describe the set up of fontconfig and xft.
It is an excellent page, I found it already some time ago, and learned a lot from it. But my question was meant as "how to install new fonts so that everything (in Debian), including all the fontconfig, xft, etc. stuff, works."
One of my problems is that mkfontscale does not seem to exist in Debian. But I cannot be very sure about this, because the Debian packages server has been down since Nov 21 because of an attack.
The present state of my own, very dim, understanding of UTF-8 use
in Linux is in <http://www.jw-stumpel.nl/stestu.html> which is
strictly written from a "user perspective". I am especially unsure
of the section called 'fontconfig magic'. But probably there are numerous other errors.
Regards, Jan
-- Linux-UTF8: i18n of Linux on all levels Archive: http://mail.nl.linux.org/linux-utf8/