[Fontconfig] language coverage

[Qianqian Fang]

do you see any downside to leave the language unspecified in
the OS/2 table in the font, or, alternatively, use fc-lang data
alone without looking up the OS/2 table in fontconfig to determine
coverage?

Keith Packard wrote:
> Yes, ttf fonts have some OS/2 table bits that indicate which Han
> languages they are designed to support; your font likely indicates that
> it supports Chinese, so fontconfig elides the Japanese language from the
> supported list, even though the font completely covers the Unicode
> codepoints required by Japanese.
>
>