Fix Bug 993709 - Improve font selection for Simplified Chinese (zh-CN)

And removed unnecessary comments in zh-TW.
Fix Bug 993704 - Improve font selection for Korean (ko)
Merge pull request #2126 from kyoshino/bug-993709-zhcn-locale-font

Fix Bug 993709 - Improve font selection for Simplified Chinese (zh-CN)
Merge pull request #2125 from kyoshino/bug-993704-ko-locale-font

Fix Bug 993704 - Improve font selection for Korean (ko)