File: //snap/gnome-42-2204/226/etc/fonts/conf.avail/65-0-fonts-gujr-extra.conf
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<!-- Gujarati (gu) -->
<match target="font">
<test name="lang" compare="contains">
<string>gu</string>
</test>
<test qual="any" name="family">
<string>sans-serif</string>
</test>
<edit name="family" mode="append" binding="same">
<string>Rekha</string>
</edit>
</match>
<match target="font">
<test name="lang" compare="contains">
<string>gu</string>
</test>
<test qual="any" name="family">
<string>serif</string>
</test>
<edit name="family" mode="append" binding="same">
<string>Lohit Gujarati</string>
</edit>
</match>
<!-- Gujarati (gu) ends -->
</fontconfig>