Issue #1869292 by Gábor Hojtsy: Remove confusing 'multiple' language from core.

core/includes/bootstrap.inc

@@ -216,18 +216,6 @@
  */
 const LANGUAGE_NOT_APPLICABLE = 'zxx';
 
-/**
- * The language code used when multiple languages could be applied.
- *
- * Should be used when individual parts of the data cannot be marked with
- * language, but we know there are multiple languages involved. Such as a
- * PDF file for an electronic appliance, which has usage manuals in 8
- * languages but is uploaded as one file in Drupal.
- *
- * Defined by ISO639-2 for "Multiple languages".
- */
-const LANGUAGE_MULTIPLE = 'mul';
-
 /**
  * Language code referring to the default language of data, e.g. of an entity.
  *
@@ -2763,11 +2751,6 @@ function language_default_locked_languages($weight = 0) {
     'name' => t('Not applicable'),
     'weight' => ++$weight,
   ) + $locked_language);
-  $languages[LANGUAGE_MULTIPLE] = new Language(array(
-    'langcode' => LANGUAGE_MULTIPLE,
-    'name' => t('Multiple'),
-    'weight' => ++$weight,
-  ) + $locked_language);
   return $languages;
 }
 

core/modules/language/language.admin.inc

@@ -40,9 +40,6 @@ function language_admin_overview_form($form, &$form_state) {
       case LANGUAGE_NOT_SPECIFIED:
         $description = t('Use this when the language is not (yet) known.');
         break;
-      case LANGUAGE_MULTIPLE:
-        $description = t('Use this when multiple languages can be assigned, such as a multilingual PDF.');
-        break;
     }
     if (!empty($description)) {
       $title .= '<div class="description">' . $description . '</div>';

core/modules/language/lib/Drupal/language/Tests/LanguageListTest.php

@@ -177,8 +177,8 @@ function testLanguageStates() {
     language_save(new Language(array('name' => $this->randomName(), 'langcode' => 'l2', 'locked' => TRUE)));
     language_save(new Language(array('name' => $this->randomName(), 'langcode' => 'l3')));
     language_save(new Language(array('name' => $this->randomName(), 'langcode' => 'l4', 'locked' => TRUE)));
-    $expected_locked_languages = array('l4' => 'l4', 'l2' => 'l2', 'und' => 'und', 'zxx' => 'zxx', 'mul' => 'mul');
-    $expected_all_languages = array('l4' => 'l4', 'l3' => 'l3', 'l2' => 'l2', 'l1' => 'l1', 'en' => 'en', 'und' => 'und', 'zxx' => 'zxx', 'mul' => 'mul');
+    $expected_locked_languages = array('l4' => 'l4', 'l2' => 'l2', 'und' => 'und', 'zxx' => 'zxx');
+    $expected_all_languages = array('l4' => 'l4', 'l3' => 'l3', 'l2' => 'l2', 'l1' => 'l1', 'en' => 'en', 'und' => 'und', 'zxx' => 'zxx');
     $expected_conf_languages = array('l3' => 'l3', 'l1' => 'l1', 'en' => 'en');
 
     $locked_languages = language_list(LANGUAGE_LOCKED);