Add localization hint for payment sheet (#656)

Marcos Cáceres · web-flow · commit 0e4539db9077 · 2018-02-16T10:29:51.000+11:00
closes #650
diff --git a/index.html b/index.html
@@ -935,7 +935,10 @@ <h2>
             <p>
               Otherwise, present a user interface to allow the user to interact
               with the <var>handlers</var>. The user agent SHOULD prioritize
-              the preference of the user when presenting payment methods.
+              the preference of the user when presenting payment methods. It is
+              RECOMMENDED 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
