How can I match fonts with their lang?

[fontconfig@xxxxxxxxxxxxxx (Keith Packard)]

Around 9 o'clock on May 20, James Su wrote:

> I want to match fonts with their lang tag, so I add following config
> into fonts.conf:
> 
> <match target="font">
> <test name="lang" compare="contains">
> <string>zh</string>
> </test>

Use compare="equal" instead of "contains".  I'm not sure 'contains' has 
sensible semantics for language sets.

-keith