diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index b6eabbd..1cd89a8 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -42,7 +42,9 @@ function language_help($path, $arg) {
       return $output;
 
     case 'admin/config/regional/language/detection/selected':
-      $output = '<p>' . t("Determine the language from a selected language or the site's default language. Selecting a different language here is preferred over <a href='@default-lang-configuration'>changing your site's default language directly</a>.", array('@default-lang-configuration' => url('admin/config/regional/language'))) . '</p>';
+      $output = '<p>' . t("Determine which language is used to display page elements (primarily text provided by Drupal and modules, such as field labels and help text), from a selected language or the site's default language.") . '</p>';
+      $output = $output . '<p>' . t("Selecting a different language here is preferred over changing your site's default language directly. Changing the site's default language can cause undesired side effects. A lot of things don't have language selectors. When you go add a view or contact form or specify the site name, there is no language selector, so Drupal can only assume you create all of those in the site's default language. If the site default langague is then switched, all the data entered earlier is now assumed to be in another language. Selecting a language here can avoid those problems.") . '</p>';
+      $output = $output . '<p>' . t("Alternatively, <a href='@default-lang-configuration'>change your site's default language directly</a> when you need the change to ripple down through everything, for example in content creation forms if a content type or vocabulary is set to default to the site default language.", array('@default-lang-configuration' => url('admin/config/regional/language'))) . '</p>';
       return $output;
 
     case 'admin/structure/block/manage/%/%':