[HarfBuzz] Some questions about scripts and languages

[Deepak Jois]

On Sat, Dec 5, 2015 at 8:22 PM, Khaled Hosny <khaledhosny at eglug.org> wrote:
>> 2. Is there a canonical list of languages that are defined in any font
>> standard? Can/does Harfbuzz validate against them? The answer seems no
>> from a cursory look at the code.
>
> https://www.microsoft.com/typography/otspec/languagetags.htm

If there is such a list, why doesn’t Harfbuzz validate the language
tag, like it does for script. I checked and I was able to pass in an
arbitrary string as a language.

Deepak