Comment 10 for bug 1043031

I did this at ppa:laney/language-selector.

It's not right, though. Let's take a look at 69-language-selector-zh-cn.conf as
an example.

 <match target="pattern">
  <test qual="any" name="family">
   <string>serif</string>
  </test>
  <edit name="family" mode="prepend" binding="strong">
   <string>DejaVu Serif</string>
   <string>Bitstream Vera Serif</string>
   <string>HYSong</string>
   <string>AR PL UMing CN</string>
   <string>AR PL UMing HK</string>
   <string>AR PL ShanHeiSun Uni</string>
   <string>AR PL New Sung</string>
   <string>WenQuanYi Bitmap Song</string>
   <string>AR PL UKai CN</string>
   <string>AR PL ZenKai Uni</string>
  </edit>
 </match>

So if I ask for "serif" I get DejaVu and Bitstream Vera before getting any
others. This overrides the default selection for /all/ users, whereas before it
would only happen for zh_CN users due to the LANG test.

We could perhaps guard the "generic" fonts by a LANG test and leave the rest
unguarded?

Or just remove those ones altogether and add the others (in "append" mode?)?

It would help a lot if someone could test these options (you can edit the file
directly in /etc/fonts/conf.avail/) and report back what the best option is.

We need to make sure that users who do not have this locale/font don't see any
change.