Edit file File name : 65-0-khmeros-base.conf Content :<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE fontconfig SYSTEM "../fonts.dtd"> <fontconfig> <!-- Generic names --> <alias> <family>Khmer OS</family> <default> <family>sans-serif</family> </default> </alias> <alias> <family>Khmer OS Content</family> <default> <family>sans-serif</family> </default> </alias> <alias> <family>Khmer OS System</family> <default> <family>sans-serif</family> </default> </alias> <!-- Locale-specific overrides --> <match> <test name="lang" compare="contains"> <string>km</string> </test> <test name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend"> <string>Khmer OS</string> </edit> </match> <match> <test name="lang" compare="contains"> <string>km</string> </test> <test name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend"> <string>Khmer OS Content</string> </edit> </match> <match> <test name="lang" compare="contains"> <string>km</string> </test> <test name="family"> <string>sans-serif</string> </test> <edit name="family" mode="prepend"> <string>Khmer OS System</string> </edit> </match> </fontconfig> Save