[css-fonts] the font-language-override property has only one implementation

[svgeesus]

https://drafts.csswg.org/css-fonts/Fonts.html#font-language-override-prop

Gecko passes; Chrome, Edge, Safari fails. It looks like this should be moved from Fonts 3 to Fonts 4.

Related: #1392 #1104

[css-meeting-bot]

The CSS Working Group just discussed the font-language-override property has only one implementation, and agreed to the following resolutions:

• RESOLVED: Move the font-language-override property to fonts L4

The full IRC log of that discussion

<dael> Topic: the font-language-override property has only one implementation
<dael> Github: https://github.com//issues/1714
<dael> Chris: Any plans for this?
<dael> fantasai: Any status on font override descriptor?
<dael> Chris: It was added. But if the property is moved the other stuff would be too. other stuff=descriptor
<dael> fantasai: Great. Is the descriptor more wide impl?
<dael> Chris: I don't think so.
<dael> fantasai: If there aren't impl witht he descriptor moving to L4 makes sense.
<dael> fantasai: If the descriptor was there it seems less work to impl the property.
<dael> Chris: I think Gecko is only impl for both.
<dael> Chris: Obj?
<dael> RESOLVED: Move the font-language-override property to fonts L4

[svgeesus]

Satisfied with resolution, still needs edits so leaving open

[litherum]

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