- Patch #1222194 by Gábor Hojtsy, plach: rename global to ().

core/includes/bootstrap.inc

@@ -183,7 +183,7 @@
 /**
  * The type of language used to select the user interface.
  */
-const LANGUAGE_TYPE_INTERFACE = 'language';
+const LANGUAGE_TYPE_INTERFACE = 'language_interface';
 
 /**
  * The type of language used for URLs.
@@ -1518,12 +1518,12 @@ function drupal_unpack($obj, $field = 'data') {
  * @ingroup sanitization
  */
 function t($string, array $args = array(), array $options = array()) {
-  global $language;
+  global $language_interface;
   static $custom_strings;
 
   // Merge in default.
   if (empty($options['langcode'])) {
-    $options['langcode'] = isset($language->langcode) ? $language->langcode : LANGUAGE_SYSTEM;
+    $options['langcode'] = isset($language_interface->langcode) ? $language_interface->langcode : LANGUAGE_SYSTEM;
   }
   if (empty($options['context'])) {
     $options['context'] = '';

core/includes/common.inc

@@ -1892,9 +1892,9 @@ function format_date($timestamp, $type = 'medium', $format = '', $timezone = NUL
   }
 
   // Use the default langcode if none is set.
-  global $language;
+  global $language_interface;
   if (empty($langcode)) {
-    $langcode = isset($language->langcode) ? $language->langcode : LANGUAGE_SYSTEM;
+    $langcode = isset($language_interface->langcode) ? $language_interface->langcode : LANGUAGE_SYSTEM;
   }
 
   switch ($type) {
@@ -2496,8 +2496,8 @@ function drupal_deliver_html_page($page_callback_result) {
   }
 
   // Send appropriate HTTP-Header for browsers and search engines.
-  global $language;
-  drupal_add_http_header('Content-Language', $language->langcode);
+  global $language_interface;
+  drupal_add_http_header('Content-Language', $language_interface->langcode);
 
   // Menu status constants are integers; page content is a string or array.
   if (is_int($page_callback_result)) {

core/includes/locale.inc

@@ -112,8 +112,8 @@
  *   The current interface language code.
  */
 function locale_language_from_interface() {
-  global $language;
-  return isset($language->langcode) ? $language->langcode : FALSE;
+  global $language_interface;
+  return isset($language_interface->langcode) ? $language_interface->langcode : FALSE;
 }
 
 /**
@@ -553,8 +553,6 @@ function locale_string_is_safe($string) {
  * Drupal.formatPlural() and inserts them into the database.
  */
 function _locale_parse_js_file($filepath) {
-  global $language;
-
   // The file path might contain a query string, so make sure we only use the
   // actual file.
   $parsed_url = drupal_parse_url($filepath);
@@ -708,12 +706,13 @@ function _locale_invalidate_js($langcode = NULL) {
 /**
  * (Re-)Creates the JavaScript translation file for a language.
  *
- * @param $language
+ * @param $langcode
  *   The language, the translation file should be (re)created for.
  */
 function _locale_rebuild_js($langcode = NULL) {
   if (!isset($langcode)) {
-    global $language;
+    global $language_interface;
+    $language = $language_interface;
   }
   else {
     // Get information about the locale.

core/includes/menu.inc

@@ -1092,7 +1092,7 @@ function menu_tree_all_data($menu_name, $link = NULL, $max_depth = NULL) {
   // Use $mlid as a flag for whether the data being loaded is for the whole tree.
   $mlid = isset($link['mlid']) ? $link['mlid'] : 0;
   // Generate a cache ID (cid) specific for this $menu_name, $link, $language, and depth.
-  $cid = 'links:' . $menu_name . ':all:' . $mlid . ':' . $GLOBALS['language']->langcode . ':' . (int) $max_depth;
+  $cid = 'links:' . $menu_name . ':all:' . $mlid . ':' . $GLOBALS['language_interface']->langcode . ':' . (int) $max_depth;
 
   if (!isset($tree[$cid])) {
     // If the static variable doesn't have the data, check {cache_menu}.
@@ -1206,7 +1206,7 @@ function menu_tree_page_data($menu_name, $max_depth = NULL, $only_active_trail =
       $max_depth = min($max_depth, MENU_MAX_DEPTH);
     }
     // Generate a cache ID (cid) specific for this page.
-    $cid = 'links:' . $menu_name . ':page:' . $item['href'] . ':' . $GLOBALS['language']->langcode . ':' . (int) $item['access'] . ':' . (int) $max_depth;
+    $cid = 'links:' . $menu_name . ':page:' . $item['href'] . ':' . $GLOBALS['language_interface']->langcode . ':' . (int) $item['access'] . ':' . (int) $max_depth;
     // If we are asked for the active trail only, and $menu_name has not been
     // built and cached for this page yet, then this likely means that it
     // won't be built anymore, as this function is invoked from
@@ -1358,7 +1358,7 @@ function _menu_build_tree($menu_name, array $parameters = array()) {
   if (isset($parameters['expanded'])) {
     sort($parameters['expanded']);
   }
-  $tree_cid = 'links:' . $menu_name . ':tree-data:' . $GLOBALS['language']->langcode . ':' . hash('sha256', serialize($parameters));
+  $tree_cid = 'links:' . $menu_name . ':tree-data:' . $GLOBALS['language_interface']->langcode . ':' . hash('sha256', serialize($parameters));
 
   // If we do not have this tree in the static cache, check {cache_menu}.
   if (!isset($trees[$tree_cid])) {

core/includes/theme.inc

@@ -2500,8 +2500,8 @@ function template_preprocess_html(&$variables) {
   $variables['body_attributes_array'] = array();
 
   // HTML element attributes.
-  $variables['html_attributes_array']['lang'] = $GLOBALS['language']->langcode;
-  $variables['html_attributes_array']['dir'] = $GLOBALS['language']->direction ? 'rtl' : 'ltr';
+  $variables['html_attributes_array']['lang'] = $GLOBALS['language_interface']->langcode;
+  $variables['html_attributes_array']['dir'] = $GLOBALS['language_interface']->direction ? 'rtl' : 'ltr';
 
   // Add favicon.
   if (theme_get_setting('toggle_favicon')) {
@@ -2571,8 +2571,8 @@ function template_preprocess_page(&$variables) {
   $variables['base_path']         = base_path();
   $variables['front_page']        = url();
   $variables['feed_icons']        = drupal_get_feeds();
-  $variables['language']          = $GLOBALS['language'];
-  $variables['language']->dir     = $GLOBALS['language']->direction ? 'rtl' : 'ltr';
+  $variables['language']          = $GLOBALS['language_interface'];
+  $variables['language']->dir     = $GLOBALS['language_interface']->direction ? 'rtl' : 'ltr';
   $variables['logo']              = theme_get_setting('logo');
   $variables['main_menu']         = theme_get_setting('toggle_main_menu') ? menu_main_menu() : array();
   $variables['secondary_menu']    = theme_get_setting('toggle_secondary_menu') ? menu_secondary_menu() : array();
@@ -2774,7 +2774,7 @@ function template_preprocess_maintenance_page(&$variables) {
   }
 
   // set the default language if necessary
-  $language = isset($GLOBALS['language']) ? $GLOBALS['language'] : language_default();
+  $language = isset($GLOBALS['language_interface']) ? $GLOBALS['language_interface'] : language_default();
 
   $variables['head_title_array']  = $head_title;
   $variables['head_title']        = implode(' | ', $head_title);

core/modules/block/block.api.php

@@ -321,7 +321,7 @@ function hook_block_view_MODULE_DELTA_alter(&$data, $block) {
  *   An array of $blocks, keyed by the block ID.
  */
 function hook_block_list_alter(&$blocks) {
-  global $language, $theme_key;
+  global $language_interface, $theme_key;
 
   // This example shows how to achieve language specific visibility setting for
   // blocks.
@@ -345,7 +345,7 @@ function hook_block_list_alter(&$blocks) {
       continue;
     }
 
-    if (!isset($block_languages[$block->module][$block->delta][$language->language])) {
+    if (!isset($block_languages[$block->module][$block->delta][$language_interface->language])) {
       // This block should not be displayed with the active language, remove
       // from the list.
       unset($blocks[$key]);

core/modules/book/book.module

@@ -1228,17 +1228,17 @@ function book_toc($bid, $depth_limit, $exclude = array()) {
  * @see book-export-html.tpl.php
  */
 function template_preprocess_book_export_html(&$variables) {
-  global $base_url, $language;
+  global $base_url, $language_interface;
 
   $variables['title'] = check_plain($variables['title']);
   $variables['base_url'] = $base_url;
-  $variables['language'] = $language;
-  $variables['language_rtl'] = ($language->direction == LANGUAGE_RTL);
+  $variables['language'] = $language_interface;
+  $variables['language_rtl'] = ($language_interface->direction == LANGUAGE_RTL);
   $variables['head'] = drupal_get_html_head();
 
   // HTML element attributes.
-  $variables['html_attributes_array']['lang'] = $language->langcode;
-  $variables['html_attributes_array']['dir'] = $language->direction ? 'rtl' : 'ltr';
+  $variables['html_attributes_array']['lang'] = $language_interface->langcode;
+  $variables['html_attributes_array']['dir'] = $language_interface->direction ? 'rtl' : 'ltr';
 }
 
 /**

core/modules/comment/comment.test

@@ -1860,10 +1860,10 @@ class CommentTokenReplaceTestCase extends CommentHelperCase {
    * Creates a comment, then tests the tokens generated from it.
    */
   function testCommentTokenReplacement() {
-    global $language;
+    global $language_interface;
     $url_options = array(
       'absolute' => TRUE,
-      'language' => $language,
+      'language' => $language_interface,
     );
 
     $this->drupalLogin($this->admin_user);
@@ -1896,8 +1896,8 @@ class CommentTokenReplaceTestCase extends CommentHelperCase {
     $tests['[comment:body]'] = _text_sanitize($instance, LANGUAGE_NONE, $comment->comment_body[LANGUAGE_NONE][0], 'value');
     $tests['[comment:url]'] = url('comment/' . $comment->cid, $url_options + array('fragment' => 'comment-' . $comment->cid));
     $tests['[comment:edit-url]'] = url('comment/' . $comment->cid . '/edit', $url_options);
-    $tests['[comment:created:since]'] = format_interval(REQUEST_TIME - $comment->created, 2, $language->langcode);
-    $tests['[comment:changed:since]'] = format_interval(REQUEST_TIME - $comment->changed, 2, $language->langcode);
+    $tests['[comment:created:since]'] = format_interval(REQUEST_TIME - $comment->created, 2, $language_interface->langcode);
+    $tests['[comment:changed:since]'] = format_interval(REQUEST_TIME - $comment->changed, 2, $language_interface->langcode);
     $tests['[comment:parent:cid]'] = $comment->pid;
     $tests['[comment:parent:title]'] = check_plain($parent_comment->subject);
     $tests['[comment:node:nid]'] = $comment->nid;
@@ -1909,7 +1909,7 @@ class CommentTokenReplaceTestCase extends CommentHelperCase {
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), t('No empty tokens generated.'));
 
     foreach ($tests as $input => $expected) {
-      $output = token_replace($input, array('comment' => $comment), array('language' => $language));
+      $output = token_replace($input, array('comment' => $comment), array('language' => $language_interface));
       $this->assertEqual($output, $expected, t('Sanitized comment token %token replaced.', array('%token' => $input)));
     }
 
@@ -1925,7 +1925,7 @@ class CommentTokenReplaceTestCase extends CommentHelperCase {
     $tests['[comment:author:name]'] = $this->admin_user->name;
 
     foreach ($tests as $input => $expected) {
-      $output = token_replace($input, array('comment' => $comment), array('language' => $language, 'sanitize' => FALSE));
+      $output = token_replace($input, array('comment' => $comment), array('language' => $language_interface, 'sanitize' => FALSE));
       $this->assertEqual($output, $expected, t('Unsanitized comment token %token replaced.', array('%token' => $input)));
     }
 
@@ -1938,7 +1938,7 @@ class CommentTokenReplaceTestCase extends CommentHelperCase {
     $tests['[node:comment-count-new]'] = 2;
 
     foreach ($tests as $input => $expected) {
-      $output = token_replace($input, array('node' => $node), array('language' => $language));
+      $output = token_replace($input, array('node' => $node), array('language' => $language_interface));
       $this->assertEqual($output, $expected, t('Node comment token %token replaced.', array('%token' => $input)));
     }
   }

core/modules/contact/contact.pages.inc

@@ -134,7 +134,7 @@ function contact_site_form_validate($form, &$form_state) {
  * @see contact_site_form_validate()
  */
 function contact_site_form_submit($form, &$form_state) {
-  global $user, $language;
+  global $user, $language_interface;
 
   $values = $form_state['values'];
   $values['sender'] = $user;
@@ -156,12 +156,12 @@ function contact_site_form_submit($form, &$form_state) {
 
   // If the user requests it, send a copy using the current language.
   if ($values['copy']) {
-    drupal_mail('contact', 'page_copy', $from, $language, $values, $from);
+    drupal_mail('contact', 'page_copy', $from, $language_interface, $values, $from);
   }
 
   // Send an auto-reply if necessary using the current language.
   if ($values['category']['reply']) {
-    drupal_mail('contact', 'page_autoreply', $from, $language, $values, $to);
+    drupal_mail('contact', 'page_autoreply', $from, $language_interface, $values, $to);
   }
 
   flood_register_event('contact', variable_get('contact_threshold_window', 3600));
@@ -270,7 +270,7 @@ function contact_personal_form_validate($form, &$form_state) {
  * @see contact_personal_form_validate()
  */
 function contact_personal_form_submit($form, &$form_state) {
-  global $user, $language;
+  global $user, $language_interface;
 
   $values = $form_state['values'];
   $values['sender'] = $user;
@@ -291,7 +291,7 @@ function contact_personal_form_submit($form, &$form_state) {
 
   // Send a copy if requested, using current page language.
   if ($values['copy']) {
-    drupal_mail('contact', 'user_copy', $from, $language, $values, $from);
+    drupal_mail('contact', 'user_copy', $from, $language_interface, $values, $from);
   }
 
   flood_register_event('contact', variable_get('contact_threshold_window', 3600));

core/modules/entity/entity.module

@@ -43,7 +43,7 @@ function entity_modules_disabled() {
  * @see hook_entity_info_alter()
  */
 function entity_get_info($entity_type = NULL) {
-  global $language;
+  global $language_interface;
 
   // Use the advanced drupal_static() pattern, since this is called very often.
   static $drupal_static_fast;
@@ -54,7 +54,7 @@ function entity_get_info($entity_type = NULL) {
 
   // hook_entity_info() includes translated strings, so each language is cached
   // separately.
-  $langcode = $language->langcode;
+  $langcode = $language_interface->langcode;
 
   if (empty($entity_info)) {
     if ($cache = cache()->get("entity_info:$langcode")) {

core/modules/field/field.info.inc

@@ -67,7 +67,7 @@ function field_info_cache_clear() {
  * @see _field_info_collate_types_reset()
  */
 function _field_info_collate_types() {
-  global $language;
+  global $language_interface;
 
   // Use the advanced drupal_static() pattern, since this is called very often.
   static $drupal_static_fast;
@@ -79,7 +79,7 @@ function _field_info_collate_types() {
 
   // The _info() hooks invoked below include translated strings, so each
   // language is cached separately.
-  $langcode = $language->langcode;
+  $langcode = $language_interface->langcode;
 
   if (!isset($info)) {
     if ($cached = cache('field')->get("field_info_types:$langcode")) {

core/modules/file/tests/file.test

@@ -1051,10 +1051,10 @@ class FileTokenReplaceTestCase extends FileFieldTestCase {
    * Creates a file, then tests the tokens generated from it.
    */
   function testFileTokenReplacement() {
-    global $language;
+    global $language_interface;
     $url_options = array(
       'absolute' => TRUE,
-      'language' => $language,
+      'language' => $language_interface,
     );
 
     // Create file field.
@@ -1084,8 +1084,8 @@ class FileTokenReplaceTestCase extends FileFieldTestCase {
     $tests['[file:mime]'] = check_plain($file->filemime);
     $tests['[file:size]'] = format_size($file->filesize);
     $tests['[file:url]'] = check_plain(file_create_url($file->uri));
-    $tests['[file:timestamp]'] = format_date($file->timestamp, 'medium', '', NULL, $language->langcode);
-    $tests['[file:timestamp:short]'] = format_date($file->timestamp, 'short', '', NULL, $language->langcode);
+    $tests['[file:timestamp]'] = format_date($file->timestamp, 'medium', '', NULL, $language_interface->langcode);
+    $tests['[file:timestamp:short]'] = format_date($file->timestamp, 'short', '', NULL, $language_interface->langcode);
     $tests['[file:owner]'] = check_plain(user_format_name($this->admin_user));
     $tests['[file:owner:uid]'] = $file->uid;
 
@@ -1093,7 +1093,7 @@ class FileTokenReplaceTestCase extends FileFieldTestCase {
     $this->assertFalse(in_array(0, array_map('strlen', $tests)), t('No empty tokens generated.'));
 
     foreach ($tests as $input => $expected) {
-      $output = token_replace($input, array('file' => $file), array('language' => $language));
+      $output = token_replace($input, array('file' => $file), array('language' => $language_interface));
       $this->assertEqual($output, $expected, t('Sanitized file token %token replaced.', array('%token' => $input)));
     }
 
@@ -1104,7 +1104,7 @@ class FileTokenReplaceTestCase extends FileFieldTestCase {
     $tests['[file:size]'] = format_size($file->filesize);
 
     foreach ($tests as $input => $expected) {
-      $output = token_replace($input, array('file' => $file), array('language' => $language, 'sanitize' => FALSE));
+      $output = token_replace($input, array('file' => $file), array('language' => $language_interface, 'sanitize' => FALSE));
       $this->assertEqual($output, $expected, t('Unsanitized file token %token replaced.', array('%token' => $input)));
     }
   }

core/modules/filter/filter.module

@@ -390,12 +390,12 @@ function filter_modules_disabled($modules) {
  * @see filter_formats_reset()
  */
 function filter_formats($account = NULL) {
-  global $language;
+  global $language_interface;
   $formats = &drupal_static(__FUNCTION__, array());
 
   // All available formats are cached for performance.
   if (!isset($formats['all'])) {
-    if ($cache = cache()->get("filter_formats:{$language->langcode}")) {
+    if ($cache = cache()->get("filter_formats:{$language_interface->langcode}")) {
       $formats['all'] = $cache->data;
     }
     else {
@@ -407,7 +407,7 @@ function filter_formats($account = NULL) {
         ->execute()
         ->fetchAllAssoc('format');
 
-      cache()->set("filter_formats:{$language->langcode}", $formats['all']);
+      cache()->set("filter_formats:{$language_interface->langcode}", $formats['all']);
     }
   }
 

core/modules/image/image.module

@@ -971,11 +971,11 @@ function image_default_style_revert($style) {
  * @see image_effect_definition_load()
  */
 function image_effect_definitions() {
-  global $language;
+  global $language_interface;
 
   // hook_image_effect_info() includes translated strings, so each language is
   // cached separately.
-  $langcode = $language->langcode;
+  $langcode = $language_interface->langcode;
 
   $effects = &drupal_static(__FUNCTION__);
 

core/modules/language/language.module

@@ -192,10 +192,10 @@ function language_delete($langcode) {
  * and checks to see if a related right to left CSS file should be included.
  */
 function language_css_alter(&$css) {
-  global $language;
+  global $language_interface;
 
   // If the current language is RTL, add the CSS file with the RTL overrides.
-  if ($language->direction == LANGUAGE_RTL) {
+  if ($language_interface->direction == LANGUAGE_RTL) {
     foreach ($css as $data => $item) {
       // Only provide RTL overrides for files.
       if ($item['type'] == 'file') {

core/modules/locale/locale.api.php

@@ -24,9 +24,9 @@
  * did not happen yet and thus they cannot rely on translated variables.
  */
 function hook_language_init() {
-  global $language, $conf;
+  global $language_interface, $conf;
 
-  switch ($language->langcode) {
+  switch ($language_interface->langcode) {
     case 'it':
       $conf['site_name'] = 'Il mio sito Drupal';
       break;
@@ -52,10 +52,10 @@ function hook_language_init() {
  *   The current path.
  */
 function hook_language_switch_links_alter(array &$links, $type, $path) {
-  global $language;
+  global $language_interface;
 
-  if ($type == LANGUAGE_TYPE_CONTENT && isset($links[$language->langcode])) {
-    foreach ($links[$language->langcode] as $link) {
+  if ($type == LANGUAGE_TYPE_CONTENT && isset($links[$language_interface->langcode])) {
+    foreach ($links[$language_interface->langcode] as $link) {
       $link['attributes']['class'][] = 'active-language';
     }
   }

core/modules/locale/locale.install

@@ -231,6 +231,49 @@ function locale_update_8000() {
   db_drop_field('locales_source', 'textgroup');
 }
 
+/**
+ * Language type 'language' renamed to 'language_interface'.
+ */
+function locale_update_8001() {
+  // Only change language_types if we had this setting saved. Keep order
+  // of types because that is significant for value dependency.
+  $types = variable_get('language_types', NULL);
+  if (!empty($types) && isset($types['language'])) {
+    $new_types = array();
+    foreach ($types as $key => $type) {
+      $new_types[$key == 'language' ? 'language_interface' : $key] = $type;
+    }
+    variable_set('language_types', $new_types);
+  }
+
+  // Rename language_negotiation_language setting if exists.
+  $setting = variable_get('language_negotiation_language', NULL);
+  if ($setting !== NULL) {
+    variable_set('language_negotiation_language_interface', $setting);
+    variable_del('language_negotiation_language');
+  }
+
+  // Rename locale_language_providers_weight_language setting if exists.
+  $weight = variable_get('locale_language_providers_weight_language', NULL);
+  if ($weight !== NULL) {
+    variable_set('locale_language_providers_weight_language_interface', $weight);
+    variable_del('locale_language_providers_weight_language');
+  }
+
+  // Update block data in all core block related tables. Contributed modules
+  // storing data for blocks will need to update for themselves.
+  $block_tables = array('block', 'block_node_type', 'block_role');
+  foreach ($block_tables as $table) {
+    db_update($table)
+    ->fields(array(
+        'delta' => 'language_interface',
+    ))
+    ->condition('delta', 'language')
+    ->condition('module', 'locale')
+    ->execute();
+  }
+}
+
 /**
  * @} End of "addtogroup updates-7.x-to-8.x"
  * The next series of updates should start at 9000.

core/modules/locale/locale.module

@@ -181,7 +181,7 @@ function locale_menu() {
  * Initialize date formats according to the user's current locale.
  */
 function locale_init() {
-  global $conf, $language;
+  global $conf, $language_interface;
   include_once DRUPAL_ROOT . '/core/includes/locale.inc';
 
   // For each date type (e.g. long, short), get the localized date format
@@ -190,7 +190,7 @@ function locale_init() {
   // settings page, where we want to display the site default and not the
   // localized version.
   if (strpos($_GET['q'], 'admin/config/regional/date-time/formats') !== 0) {
-    $languages = array($language->langcode);
+    $languages = array($language_interface->langcode);
 
     // Setup appropriate date formats for this locale.
     $formats = locale_get_localized_date_format($languages);
@@ -218,12 +218,12 @@ function locale_permission() {
  * @see locale_form_alter()
  */
 function locale_language_selector_form($user) {
-  global $language;
+  global $language_interface;
   // Get list of enabled languages only.
   $languages = language_list(TRUE);
 
   // If the user is being created, we set the user language to the page language.
-  $user_preferred_language = $user->uid ? user_preferred_language($user) : $language;
+  $user_preferred_language = $user->uid ? user_preferred_language($user) : $language_interface;
 
   $names = array();
   foreach ($languages as $langcode => $item) {
@@ -592,7 +592,7 @@ function locale_language_delete($language) {
  *   Language code to use for the lookup.
  */
 function locale($string = NULL, $context = NULL, $langcode = NULL) {
-  global $language;
+  global $language_interface;
 
   // Use the advanced drupal_static() pattern, since this is called very often.
   static $drupal_static_fast;
@@ -607,11 +607,12 @@ function locale($string = NULL, $context = NULL, $langcode = NULL) {
     return $locale_t;
   }
 
-  $langcode = isset($langcode) ? $langcode : $language->langcode;
+  $langcode = isset($langcode) ? $langcode : $language_interface->langcode;
 
   // Store database cached translations in a static variable. Only build the
-  // cache after $language has been set to avoid an unnecessary cache rebuild.
-  if (!isset($locale_t[$langcode]) && isset($language)) {
+  // cache after $language_interface has been set to avoid an unnecessary cache
+  // rebuild.
+  if (!isset($locale_t[$langcode]) && isset($language_interface)) {
     $locale_t[$langcode] = array();
     // Disabling the usage of string caching allows a module to watch for
     // the exact list of strings used on a page. From a performance
@@ -702,7 +703,7 @@ function locale_reset() {
  *   plural formula.
  */
 function locale_get_plural($count, $langcode = NULL) {
-  global $language;
+  global $language_interface;
 
   // Used to locally cache the plural formulas for all languages.
   $plural_formulas = &drupal_static(__FUNCTION__, array());
@@ -710,7 +711,7 @@ function locale_get_plural($count, $langcode = NULL) {
   // individually for each language.
   $plural_indexes = &drupal_static(__FUNCTION__ . ':plurals', array());
 
-  $langcode = $langcode ? $langcode : $language->langcode;
+  $langcode = $langcode ? $langcode : $language_interface->langcode;
 
   if (!isset($plural_indexes[$langcode][$count])) {
     // Retrieve and statically cache the plural formulas for all languages.
@@ -788,7 +789,7 @@ function locale_system_update($components) {
  * file if necessary, and adds it to the page.
  */
 function locale_js_alter(&$javascript) {
-  global $language;
+  global $language_interface;
 
   $dir = 'public://' . variable_get('locale_js_directory', 'languages');
   $parsed = variable_get('javascript_parsed', array());
@@ -820,11 +821,11 @@ function locale_js_alter(&$javascript) {
   }
 
   // If necessary, rebuild the translation file for the current language.
-  if (!empty($parsed['refresh:' . $language->langcode])) {
+  if (!empty($parsed['refresh:' . $language_interface->langcode])) {
     // Don't clear the refresh flag on failure, so that another try will
     // be performed later.
     if (_locale_rebuild_js()) {
-      unset($parsed['refresh:' . $language->langcode]);
+      unset($parsed['refresh:' . $language_interface->langcode]);
     }
     // Store any changes after refresh was attempted.
     variable_set('javascript_parsed', $parsed);
@@ -837,9 +838,9 @@ function locale_js_alter(&$javascript) {
 
   // Add the translation JavaScript file to the page.
   $locale_javascripts = variable_get('locale_translation_javascript', array());
-  if ($files && !empty($locale_javascripts[$language->langcode])) {
+  if ($files && !empty($locale_javascripts[$language_interface->langcode])) {
     // Add the translation JavaScript file to the page.
-    $file = $dir . '/' . $language->langcode . '_' . $locale_javascripts[$language->langcode] . '.js';
+    $file = $dir . '/' . $language_interface->langcode . '_' . $locale_javascripts[$language_interface->langcode] . '.js';
     $javascript[$file] = drupal_js_defaults($file);
   }
 }
@@ -850,14 +851,14 @@ function locale_js_alter(&$javascript) {
  * Provides the language support for the jQuery UI Date Picker.
  */
 function locale_library_info_alter(&$libraries, $module) {
-  global $language;
+  global $language_interface;
   if ($module == 'system' && isset($libraries['system']['ui.datepicker'])) {
     $datepicker = drupal_get_path('module', 'locale') . '/locale.datepicker.js';
     $libraries['system']['ui.datepicker']['js'][$datepicker] = array('group' => JS_THEME);
     $libraries['system']['ui.datepicker']['js'][] = array(
       'data' => array(
         'jqueryuidatepicker' <