Issue #1738374 by sxnc, Gábor Hojtsy: Provide a cue to enable the language...

Issue #1738374 by sxnc, Gábor Hojtsy: Provide a cue to enable the language switcher when adding a language.

core/modules/language/language.admin.inc

@@ -199,7 +199,7 @@ function language_admin_add_form($form, &$form_state) {
       ),
     ),
     '#validate' => array('language_admin_add_predefined_form_validate'),
-    '#submit' => array('language_admin_add_predefined_form_submit'),
+    '#submit' => array('language_admin_add_form_submit'),
   );
 
   $form['custom_language'] = array(
@@ -215,7 +215,7 @@ function language_admin_add_form($form, &$form_state) {
     '#type' => 'submit',
     '#value' => t('Add custom language'),
     '#validate' => array('language_admin_add_custom_form_validate'),
-    '#submit' => array('language_admin_add_custom_form_submit'),
+    '#submit' => array('language_admin_add_form_submit'),
   );
 
   return $form;
@@ -325,34 +325,34 @@ function language_admin_add_custom_form_validate($form, &$form_state) {
 }
 
 /**
- * Process the custom language addition form submission.
+ * Process the custom and predefined language addition form submission.
  */
-function language_admin_add_custom_form_submit($form, &$form_state) {
-  $langcode = $form_state['values']['langcode'];
-  // Custom language form.
-  $language = (object) array(
-    'langcode' => $langcode,
-    'name' => $form_state['values']['name'],
-    'direction' => $form_state['values']['direction'],
-  );
-  language_save($language);
-  drupal_set_message(t('The language %language has been created and can now be used.', array('%language' => $form_state['values']['name'])));
-  $form_state['redirect'] = 'admin/config/regional/language';
-}
-
-/**
- * Process the predefined language addition form submission.
- */
-function language_admin_add_predefined_form_submit($form, &$form_state) {
-  // Predefined language selection.
+function language_admin_add_form_submit($form, &$form_state) {
   $langcode = $form_state['values']['predefined_langcode'];
-  include_once DRUPAL_ROOT . '/core/includes/standard.inc';
-  $predefined = standard_language_list();
-  $language = (object) array(
-    'langcode' => $langcode,
-  );
-  language_save($language);
-  drupal_set_message(t('The language %language has been created and can now be used.', array('%language' => t($predefined[$langcode][0]))));
+  if ($langcode == 'custom') {
+    $langcode = $form_state['values']['langcode'];
+    // Custom language form.
+    $language = (object) array(
+      'langcode' => $langcode,
+      'name' => $form_state['values']['name'],
+      'direction' => $form_state['values']['direction'],
+    );
+  }
+  else {
+    include_once DRUPAL_ROOT . '/core/includes/standard.inc';
+    $predefined = standard_language_list();
+    $language = (object) array(
+      'langcode' => $langcode,
+    );
+  }
+  // Save the language and inform the user that it happened.
+  $language = language_save($language);
+  drupal_set_message(t('The language %language has been created and can now be used.', array('%language' => $language->name)));
+
+  // Tell the user they have the option to add a language switcher block
+  // to their theme so they can switch between the languages.
+  drupal_set_message(t('Use one of the language switcher blocks to allow site visitors to switch between languages. You can enable these blocks on the <a href="@block-admin">block administration page</a>.', array('@block-admin' => 'admin/structure/block')));
+
   $form_state['redirect'] = 'admin/config/regional/language';
 }