diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index d96480a..4b8300b 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -23,27 +23,29 @@ function language_help($path, $arg) {
     case 'admin/help#language':
       $output = '';
       $output .= '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Language module allows you to configure the languages used on your site, and provides information for the for <a href="!content">Content Translation</a>, <a href="!interface">Interface Translation</a>, and <a href="!configuration">Configuration Translation</a> modules, if they are enabled. For more information, see <a href="!doc_url">the online documentation for the Language module</a>.', array('!doc_url' => 'https://drupal.org/documentation/modules/language', '!content' => \Drupal::url('help.page', array('name' => 'content_translation')), '!interface' => \Drupal::url('help.page', array('name' => 'locale')), '!configuration' => \Drupal::url('help.page', array('name' => 'configuration_translation')))) . '</p>';
+      $output .= '<p>' . t('The Language module allows you to configure the languages used on your site, and provides information for the for <a href="!content">Content Translation</a>, <a href="!interface">Interface Translation</a>, and <a href="!configuration">Configuration Translation</a> modules, if they are enabled. For more information, see <a href="!doc_url">the online documentation for the Language module</a>.', array('!doc_url' => 'https://drupal.org/documentation/modules/language', '!content' => (\Drupal::moduleHandler()->moduleExists('content_translation')) ? \Drupal::url('help.page', array('name' => 'content_translation')) : '#', '!interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#', '!configuration' => (\Drupal::moduleHandler()->moduleExists('configuration_translation')) ? \Drupal::url('help.page', array('name' => 'configuration_translation')) : '#')) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Adding languages') . '</dt>';
-      $output .= '<dd>' . t('You can add languages on the <a href="!language_list">Languages</a> page by clicking on <em>Add language</em> and choosing a language from the drop-down menu. This language is then displayed in the languages list, where it can be configured further. If the <a href="!interface">Interface Translation module</a> is installed, then interface translation for this language is automatically downloaded as well.' , array('!language_list' => \Drupal::url('language.admin_overview'), '!interface' => \Drupal::url('help.page', array('name' => 'locale')))) . '</dd>';
+      $output .= '<dd>' . t('You can add languages on the <a href="!language_list">Languages</a> page by clicking on <em>Add language</em> and choosing a language from the drop-down menu. This language is then displayed in the languages list, where it can be configured further. If the <a href="!interface">Interface translation module</a> is enabled, and the <em>Drupal translation server</em> is set as a translation source, then interface translation for this language is automatically downloaded as well.' , array('!language_list' => \Drupal::url('language.admin_overview'), '!interface' => (\Drupal::moduleHandler()->moduleExists('locale')) ? \Drupal::url('help.page', array('name' => 'locale')) : '#')) . '</dd>';
       $output .= '<dt>' . t('Adding custom languages') . '</dt>';
       $output .= '<dd>' . t('You can add a language that is not provided in the drop-down list by choosing <em>Custom language</em> at the end of the list. You then have to configure its language code, name, and direction in the form provided.') . '</dd>';
-      $output .= '<dt>' . t('Customizing content languages settings') . '</dt>';
-      $output .= '<dd>' . t('By default content is created in the site\'s default language and no language selector is displayed on content creation pages. On the <a href="!content_language">Content language</a> page you can customize the language settings for any supported content entity of your site (for example for content types or menu links). After choosing an entity, you are provided with a drop-down menu to set the default language and a checkbox to display language selectors.', array('!content_language' => \Drupal::url('language.content_settings_page'))) . '</dd>';
-      $output .= '<dt>' . t('Adding a language switcher block') . '</dt>';
-      $output .= '<dd>' . t('If the <a href="!block-help">Blocks module</a> is enabled, then you can add a language switcher block on the <a href="!blocks">Block layout</a> page to your site to allow users to switch between languages.', array('!blocks' => \Drupal::url('block.admin_display'), '!block-help' => \Drupal::url('help.page', array('name' => 'blocks')))) . '</dd>';
+       $output .= '<dt>' . t('Setting administration languages') . '</dt>';
+       $output .= '<dd>' . t('If the <em>Account administration pages</em> method is enable on the <a href="!detection">Detection and selection</a> page, then each administrator can set a second language on their profile page to use for site administration.', array('!detection' => \Drupal::url('language.negotiation'))) . '</dd>';
+       $output .= '<dt>' . t('Configuring content languages') . '</dt>';
+       $output .= '<dd>' . t('By default content is created in the site\'s default language and no language selector is displayed on content creation pages. On the <a href="!content_language">Content language</a> page you can customize the language configuration for any supported content entity on your site (for example for content types or menu links). After choosing an entity, you are provided with a drop-down menu to set the default language and a checkbox to display language selectors.', array('!content_language' => \Drupal::url('language.content_settings_page'))) . '</dd>';
+       $output .= '<dt>' . t('Adding a language switcher block') . '</dt>';
+       $output .= '<dd>' . t('If the Blocks module is enabled, then you can add a language switcher block on the <a href="!blocks">Block layout</a> page to your site to allow users to switch between languages.', array('!blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
       $output .= '<dt>' . t('Making a block visible per language') . '</dt>';
-      $output .= '<dd>' . t('The Language module adds an option to set the visibilty of a block based on selected languages when you configure a block on the <a href="!blocks">Block layout</a> page.', array('!blocks' => \Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('If the Block module is enabled, then the Language module allows you to set the visibilty of a block based on selected languages on the <a href="!blocks">Block layout</a> page.', array('!blocks' => (\Drupal::moduleHandler()->moduleExists('block')) ? \Drupal::url('block.admin_display') : '#')) . '</dd>';
       $output .= '<dt>' . t('Language detection and selection');
-      $output .= '<dd>' . t('The <a href="!detection">Detection and selection</a> page provides several methods by which the site detects in which language to display interface text. Your can arrange the methods so that your prefered method is applied first, and a fallback option last.');
-      $output .= '<ul><li>' . t('<em>URL</em> sets the interface language based on a path prefix or domain. (For example specifing  <em>de</em> for German  would result in URLs like <em>example.com/de/contact</em>.) The default language does not require a path prefix, but can have one assigned as well. If the language detection is done by domain name, a URL needs to be specified for each language.') . '</li>';
+      $output .= '<dd>' . t('The <a href="!detection">Detection and selection</a> page provides several methods to detect in which language interface text is displayed. Your can arrange the methods so that your prefered method is applied first, and a fallback option last.');
+      $output .= '<ul><li>' . t('<em>URL</em> sets the interface language based on a path prefix or domain. (For example specifing <em>de</em> for German  would result in URLs like <em>example.com/de/contact</em>.) The default language does not require a path prefix, but can have one assigned as well. If the language detection is done by domain name, a URL needs to be specified for each language.') . '</li>';
       $output .= '<li>' . t('<em>Session</em> determines the interface language for a request or session parameter. (For example <em>example.com?language=de</em> would set the language to German based on the use of <em>de</em> within the <em>language</em> parameter.)') . '</li>';
-      $output .= '<li>' . t('<em>User</em> follows the user\'s language settings as specified on the user\'s profile page.') . '</li>';
+      $output .= '<li>' . t('<em>User</em> follows the user\'s language configuration set on the user\'s profile page.') . '</li>';
       $output .= '<li>' . t('<em>Browser</em> sets the interface language based on the browser\'s language settings. Since browsers use different language codes to refer to the same languages, you can add and edit languages codes to map the browser language codes to the <a href="!language_list">language codes</a> used on your site.',  array('!language_list' => \Drupal::url('language.admin_overview'))) . '</li>';
-      $output .= '<li>' . t('<em>Account administration pages</em> sets the interface language based on the language that is set for the specific user on their user page.') . '</li>';
-      $output .= '<li>' . t('<em>Selected language</em> allows you to specify the site\'s default language or a specific language as fallback language. This method should be listed last.') . '</li></ul></dd>';
+      $output .= '<li>' . t('If the <em>Account administration pages</em> method is enabled, then administration users can add a second language on their profile page, and the interface text language then follows that configuration.') . '</li>';
+      $output .= '<li>' . t('<em>Selected language</em> allows you to specify the site\'s default language or a specific language as fallback language. This method should be listed last.') . '</li></ul></dd>'; 
       $output .= '</dl>';
       return $output;