--- /dev/null
+/**
+ * @file
+ * Language: add styling for elements that have a language attribute.
+ */
+
+/**
+ * Show the user that a 'lang' tag has been applied by adding a thin dotted
+ * border. We also append the value of the tag between brackets, for example:
+ * '(en)'. Since the html element has a 'lang' attribute too we only target
+ * elements within the html scope.
+ */
+html [lang] {
+ outline: 1px dotted gray;
+}
+html [lang]:after {
+ content: " ("attr(lang)")";
+ font-size: 10px;
+ color: #666;
+}