diff --git a/modules/locale/locale.admin.inc b/modules/locale/locale.admin.inc
index d8201db..b0a77c5 100644
--- a/modules/locale/locale.admin.inc
+++ b/modules/locale/locale.admin.inc
@@ -80,9 +80,19 @@ function theme_locale_languages_overview_form($variables) {
       if ($key == $default->language) {
         $form['enabled'][$key]['#attributes']['disabled'] = 'disabled';
       }
+
+      // Add invisible labels for the checkboxes and radio buttons in the table
+      // for accessibility. These changes are only required and valid when the
+      // form is themed as a table, so it would be wrong to perform them in the
+      // form constructor.
+      $title = drupal_render($form['name'][$key]);
+      $form['enabled'][$key]['#title'] = t('Enable !title', array('!title' => $title));
+      $form['enabled'][$key]['#title_display'] = 'invisible';
+      $form['site_default'][$key]['#title'] = t('Set !title as default', array('!title' => $title));
+      $form['site_default'][$key]['#title_display'] = 'invisible';
       $rows[] = array(
         'data' => array(
-          '<strong>' . drupal_render($form['name'][$key]) . '</strong>',
+          '<strong>' . $title . '</strong>',
           drupal_render($form['native'][$key]),
           check_plain($key),
           drupal_render($form['direction'][$key]),