Apply suggestions from code review

Co-authored-by: Addison Phillips <[email protected]>

Author: marcoscaceres

index.html

@@ -444,9 +444,9 @@ <h2>
         <h3>
           `dir` member
         </h3>
-        <p>
+        <p data-cite="i18n-glossary">
           The [=manifest's=] <code><dfn data-export="" data-dfn-for=
-          "manifest">dir</dfn></code> member specifies the string direction for
+          "manifest">dir</dfn></code> member specifies the default [=string direction=] for
           the <a>localizable members</a> of the <a>manifest</a>. The
           [=manifest/dir=] member's value can be set to a
           <a>text-direction</a>.