@@ -2636,10 +2636,13 @@ The Language Pseudo-class: '':lang()''</h3>
|
2636 | 2636 | its <a>content language</a>, as represented in BCP 47 syntax, |
2637 | 2637 | matches the given <a>language range</a> in an <i>extended filtering</i> |
2638 | 2638 | operation per [[!RFC4647]] <cite>Matching of Language Tags</cite> (section 3.3.2). |
2639 | | -Both the [=content language=] and the [=language range=] |
| 2639 | +The [=content language=] and the [=language range=] |
2640 | 2640 | must be <i>canonicalized</i> |
2641 | 2641 | and converted to <i>extlang form</i> as per section 4.5 of [[!RFC5646]] |
2642 | | - prior to the <i>extended filtering</i> operation. |
| 2642 | + prior to the <i>extended filtering</i> operation; |
| 2643 | + language tags or ranges that are not |
| 2644 | +<a href="https://www.w3.org/TR/i18n-glossary/#dfn-valid">valid</a> |
| 2645 | + do not match anything. |
2643 | 2646 | The matching is performed [=ASCII case-insensitively=]. |
2644 | 2647 | |
2645 | 2648 | The <a>language range</a> |
@@ -5181,7 +5184,15 @@ Changes since the 22 January 2026 Working Draft
|
5181 | 5184 | (<a href="https://github.com/w3c/csswg-drafts/issues/8720">Issue 8720</a>) |
5182 | 5185 | * Reworded constraints on language ranges |
5183 | 5186 | (<a href="https://github.com/w3c/csswg-drafts/issues/8720">Issue 8720</a>) |
5184 | | - <!-- to 27 May 2026 --> |
| 5187 | + * Clarified that :picture-in-picture applies to the embedder element, not the PiP display |
| 5188 | + (<a href="https://github.com/w3c/csswg-drafts/issues/13720">Issue 13720</a>) |
| 5189 | + * Renamed <an+b> to <a-n-plus-b> |
| 5190 | + (<a href="https://github.com/w3c/csswg-drafts/issues/9473">Issue 9473</a>) |
| 5191 | + * Added CanIUse panels |
| 5192 | + (<a href="https://github.com/w3c/csswg-drafts/issues/1193">Issue 1193</a>) |
| 5193 | + * Forbade non-valid tags/ranges from ever matching |
| 5194 | + (<a href="https://github.com/w3c/csswg-drafts/issues/3022#issuecomment-4568519381">Issue 3022</a>) |
| 5195 | + <!-- to 2 July 2026 --> |
5185 | 5196 | |
5186 | 5197 | <h3 id="changes-2022-11"> |
5187 | 5198 | Changes since the 11 November 2022 Working Draft</h3> |
|
