Edit file File name : 31-cantarell.conf Content :<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE fontconfig SYSTEM "../fonts.dtd"> <!-- Define aliasing and other fontconfig settings for Cantarell. --> <fontconfig> <!-- Font substitution --> <alias binding="same"> <family>system-ui</family> <accept> <family>Cantarell</family> </accept> </alias> <!-- Generic name assignment --> <alias> <family>Cantarell</family> <default> <family>system-ui</family> </default> </alias> <match target="pattern"> <test qual="any" name="family"> <string>Cantarell</string> </test> <edit name="family" mode="assign" binding="weak"> <string>Cantarell</string> </edit> </match> </fontconfig> Save