[selectors-4] Respond to review feedback on BCP 47 language codes, #13647

Author: svgeesus

selectors-4/Overview.bs

@@ -2014,7 +2014,7 @@ Attribute presence and value selectors</h3>
 			or beginning with "val" immediately followed by "-" (U+002D).
 			This is primarily intended to allow language subcode matches
 			(e.g., the <code>hreflang</code> attribute on the <a element>a</a> element in HTML)
-			as described in BCP 47 ([[BCP47]]) or its successor.
+			as described in BCP 47 ([[BCP47]]).
 			For <code>lang</code> (or <code>xml:lang</code>) language subcode matching,
 			please see the '':lang()'' pseudo-class.
 	</dl>
@@ -2632,9 +2632,9 @@ The Language Pseudo-class: '':lang()''</h3>
 	matches (only) elements whose language is not tagged.
 
 	Note: It is recommended that documents and protocols
-	indicate language using codes from [[BCP47]] or its successor,
+	indicate language using language tags from [[BCP47]],
 	and in the case of XML-based formats, by means of <code>xml:lang</code> attributes. [[XML10]]
-	See <a href="http://www.w3.org/International/questions/qa-lang-2or3.html">“FAQ: Two-letter or three-letter language codes.”</a>
+	See <a href="https://www.w3.org/International/questions/qa-choosing-language-tags">“Choosing a Language Tag”</a>
 
 	<div class="example">
 		Examples: