Export "plausible language" or something similar.

[jyasskin]

Since @inexorabletash's WICG/local-font-access#76, https://wicg.github.io/local-font-access/#user-language is now defined as "either a plausible language or the user’s most preferred language", but "a plausible language" isn't exported from HTML. It's not urgent, but it'd be good for HTML to export the terms that other specs want to use, or for us to pick something else to reference from that other spec.

It's possible that HTML should actually export a term for the thing that winds up in navigator.language, instead of making other specs repeat the phrase that defines it.

[domenic]

It's interesting to contrast this with other specs which key off of the document's language, e.g. https://w3c.github.io/payment-request/ step 18.

But it looks like this data is coming from some OS API which is probably (like navigator.language?) configured by the user, instead of document's language which can be configured by the developer. So local-font-access is correct and indeed wants the kind of hook you mention.