Alternatives match language

understanding/20/non-text-content.html

@@ -76,6 +76,11 @@ <h3>
          </ul>
 
       </section>
+
+      <section>
+         <h3>Note on alternatives matching the language of content</h3>
+         <p>Text alternatives and equivalents should match the human language of the original content (normally the default human language of the page). <a href="https://www.w3.org/TR/WCAG22/#conformance-reqs">5.2 Conformance Requirements<a>, and the defined terms used in the section, state that success criteria be met through accessibility-supported ways (5.2.4), where the technology is used “in the human language of the content.” Where an alternative version is used (5.2.1), it is defined as something that “provides all of the same information and functionality in the same human language.”</p>
+      </section>
 
       <section>
 

understanding/20/time-based-media.html

@@ -53,6 +53,7 @@ <h2>Intent of Time-Based Media</h2>
 
       <p>
          Synchronized media is defined in the glossary as:
+         <block>audio or video synchronized with another format for presenting information and/or with time-based interactive components, unless the media is a media alternative for text that is clearly labeled as such</block>
       </p>
 
       <p id="copysynchronizedmediadef"></p>
@@ -87,6 +88,12 @@ <h2>Intent of Time-Based Media</h2>
       </p>
 
    </section>
+
+   <section><h3>Text alternatives and equivalents match the language of the content</h3>
+      <p>Text alternatives and equivalents should match the human language of the original content (normally the default human language of the page). <a href="https://www.w3.org/TR/WCAG22/#conformance-reqs">5.2 Conformance Requirements<a>, and the defined terms used in the section, state that success criteria be met through accessibility-supported ways (5.2.4), where the technology is used “in the human language of the content.” Where an alternative version is used (5.2.1), it is defined as something that “provides all of the same information and functionality in the same human language.”</p>
+      <p>For time-based media, that normally means that where the spoken language of the media is Spanish, the language used in captions, audio descriptions, and media alternatives will also be Spanish.</p>
+         </p>
+      </section>
 
    <section id="advisory">
       <h3>Additional Techniques (Advisory) for Time-Based Media</h3>