When the system displays a text, whose responsibility is to select the appropriate font for the letters?  Let's say I have the following 3 fonts installed and I open a website with letters and special characters. When and how does the system decide which fonts to use?Default system font: ISO basic Latin alphabetFontA: special characters onlyFontB: basic alphabet + special characters
Unicode fallback font
fonts;window manager;display manager
Most apps nowadays rely on the fontconfig library to render fonts. Its configuration files usually provided with the package are documented and self-descriptive. System-wide conf. files placed in the /etc/fonts/conf.d/ directory. Fallback font settings are usually in the 60-latin.conf and 65-non-latin.conf files.