Proposed Resolution: Any :lang() argument that cannot be parsed with the BCP-47 syntax causes the selector to not match

Hey all,

This is notice that we will be taking this resolution in one week’s time unless objections (or substantive concerns) are raised in this issue:

https://github.com/w3c/csswg-drafts/issues/8720#issuecomment-4070065589

Thanks,

Alan

Received on Monday, 16 March 2026 19:30:28 UTC