fonts.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- $XDG_CONFIG_HOME/fontconfig/fonts.conf file to configure system font access -->
<fontconfig>

<!--
  Replace default 'monospace' font
-->
	<match target="pattern">
		<test qual="any" name="family">
			<string>monospace</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>Noto Mono</string>
		</edit>
	</match>

<!--
  Replace default 'sans-serif' font
-->
	<match target="pattern">
		<test qual="any" name="family">
			<string>sans-serif</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>Noto Sans</string>
		</edit>
	</match>

<!--
  Replace default 'serif' font
-->
	<match target="pattern">
		<test qual="any" name="family">
			<string>serif</string>
		</test>
		<edit name="family" mode="assign" binding="same">
			<string>Noto Serif</string>
		</edit>
	</match>

</fontconfig>