Ticket #31318: 31318.2.patch

wp-admin/options-general.php

@@ -308 +308 @@
                 <th width="33%" scope="row"><label for="WPLANG"><?php _e( 'Site Language' ); ?></label></th>
                 <td>
                         <?php
-                        $locale = get_option( 'WPLANG' );
+                        $locale = get_locale();
                         if ( ! in_array( $locale, $languages ) ) {
                                 $locale = '';
                         }