Address review feedback

Author: marcoscaceres

index.html

@@ -951,11 +951,17 @@ <h2>
 <li>
 <p>
 Otherwise, present a user interface to allow the user to interact
-with the <var>handlers</var>. Optionally, if
-<var>request</var>.<a>[[\uiLang]]</a> is not null, localize the
-user interface to match, as closely as possible, the language of
-<a>[[\uiLang]]</a>. The user agent SHOULD prioritize the
-preference of the user when presenting payment methods.
+with the <var>handlers</var>. The user agent SHOULD prioritize
+the preference of the user when presenting payment methods.
+</p>
+<p>
+Optionally, if <var>request</var>.<a>[[\uiLang]]</a> is not null,
+localize the user interface to match, as closely as possible, the
+language of <a>[[\uiLang]]</a>. Otherwise, if
+<var>request</var>.<a>[[\uiLang]]</a> is null, is it RECOMMEDED
+that the language of the user interface match the <a data-cite=
+"!HTML#language">language</a> of <a data-cite=
+"html#the-body-element-2">the body element</a>.
 </p>
 <p>
 For the <a>payment handler</a> selected by the end-user, the user