Comment 37 for bug 1173571

I don't actually get what you mean here. But I guess that you are talking about it is better to use Western serif font listed before AR PL UMing for serif font family.

69-language-selector-zh-tw.conf does not affect the result about serif font family strongly. It is always using AR PL UMing first before DejaVu Serif no matter how you change 69-language-selector-zh-tw.conf. I doubt there are some other configurations in combination may have assign AR PL UMing higher priority. And if you want Western font listed before AR PL UMing we have to investigate further to solve the issue.

You can see comment #14 for my previous test on changing zh-tw.conf.