找到了,line 468原来是这段代码
<match target="font">
<test target="pattern" name="lang" compare="contains">
<string>zh-tw</string>
<string>zh-cn</string>
<string>ja</string>
<string>ko</string>
</test>
<edit name="spacing">
<const>proportional</const>
</edit>
<edit name="globaladvance">
搞定了,原来忘了把这段代码放在</fontconfig>之前,晕