calculate-overlay/media-fonts/xo-fonts/files/60-xo-fonts.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
	<match target="pattern">
		<test qual="any" name="family"><string>Times New Roman</string></test>
		<edit name="family" mode="assign"><string>XO Thames</string></edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family"><string>Arial</string></test>
		<edit name="family" mode="assign"><string>XO Oriel</string></edit>
	</match>
	<match target="pattern">
		<test qual="any" name="family"><string>Courier</string></test>
		<edit name="family" mode="assign"><string>XO Courser</string></edit>
	</match>
</fontconfig>