Description of problem:
In CJK environment, too large CJK fonts make it difficult to read documents.
Fonts setting by "Preferences" is useless.

Version-Release number of selected component (if applicable):
yelp-2.14.1-1.fc5

How reproducible:
Always

Steps to Reproduce:
1. LANG=zh_TW.UTF-8 yelp
2.
3.
  
Actual results:
Too large CJK fonts.

Expected results:
At lease change the fonts size when user change preferences's settings.

Additional info:
Attached file is my patch just for Simplified & Traditional Chinese and 
Japanese. I am not familiar with GTK programing, it is easier to regexp a 
locale string by using "QRegExp", but I do not know how to do it with GTK.

If we can apply the following line in /usr/bin/mozilla:
   MOZLOCALE=`echo $LANG | sed "s|_\([^.]*\).*|-\1|g"`
to yelp, then change fonts size for all locales should work and the code 
should be more clean.