Ticket #31736: 31736.diff

src/wp-includes/post-template.php

@@ -675 +675 @@
                         $classes[] = 'post-type-paged-' . $page;
         }
 
+        $locale = get_locale();
+        $classes[] = 'locale-' . $locale;
+
         if ( ! empty( $class ) ) {
                 if ( !is_array( $class ) )
                         $class = preg_split( '#\s+#', $class );