Issue #1935022 by dawehner, Gábor Hojtsy: Add a language selector on views.

core/modules/node/config/views.view.frontpage.yml

+langcode: en
+status: '1'
 base_field: nid
 base_table: node
 core: 8.x
 description: 'A list of nodes marked for display on the front page.'
-status: '1'
 display:
   default:
     display_options:

core/modules/views/config/views.view.archive.yml

+langcode: en
 status: '0'
 module: node
 id: archive

core/modules/views/config/views.view.backlinks.yml

+langcode: en
 status: '0'
 module: search
 id: backlinks

core/modules/views/config/views.view.comments_recent.yml

+langcode: en
 status: '0'
 module: comment
 id: comments_recent

core/modules/views/config/views.view.glossary.yml

+langcode: en
 status: '0'
 module: node
 id: glossary

core/modules/views/config/views.view.taxonomy_term.yml

+langcode: en
 status: '0'
 module: taxonomy
 id: taxonomy_term

core/modules/views/config/views.view.tracker.yml

+langcode: en
 status: '0'
 module: node
 id: tracker

core/modules/views/lib/Drupal/views/Plugin/Core/Entity/View.php

@@ -365,6 +365,7 @@ public function getExportProperties() {
       'id',
       'tag',
       'uuid',
+      'langcode',
     );
     $properties = array();
     foreach ($names as $name) {

core/modules/views/lib/Drupal/views/Plugin/views/wizard/WizardPluginBase.php

@@ -556,6 +556,7 @@ protected function row_style_options() {
    */
   protected function build_filters(&$form, &$form_state) {
     // Find all the fields we are allowed to filter by.
+    module_load_include('inc', 'views_ui', 'admin');
     $fields = views_fetch_fields($this->base_table, 'filter');
 
     $bundles = entity_get_bundles($this->entity_type);
@@ -625,6 +626,7 @@ protected function instantiate_view($form, &$form_state) {
       'human_name' => $form_state['values']['human_name'],
       'description' => $form_state['values']['description'],
       'base_table' => $this->base_table,
+      'langcode' => language_default()->langcode,
     );
 
     $view = entity_create('view', $values);
@@ -821,6 +823,7 @@ protected function default_display_filters_user(array $form, array &$form_state)
       // Figure out the table where $bundle_key lives. It may not be the same as
       // the base table for the view; the taxonomy vocabulary machine_name, for
       // example, is stored in taxonomy_vocabulary, not taxonomy_term_data.
+      module_load_include('inc', 'views_ui', 'admin');
       $fields = views_fetch_fields($this->base_table, 'filter');
       if (isset($fields[$this->base_table . '.' . $bundle_key])) {
         $table = $this->base_table;

core/modules/views/lib/Drupal/views/Tests/UI/StorageTest.php

@@ -7,6 +7,8 @@
 
 namespace Drupal\views\Tests\UI;
 
+use Drupal\Core\Language\Language;
+
 /**
  * Tests the UI of storage properties of views.
  */
@@ -19,6 +21,13 @@ class StorageTest extends UITestBase {
    */
   public static $testViews = array('test_view');
 
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('views_ui', 'language');
+
   public static function getInfo() {
     return array(
       'name' => 'Storage properties',
@@ -34,19 +43,22 @@ public static function getInfo() {
    */
   public function testDetails() {
     $view_name = 'test_view';
-    $view = views_get_view($view_name);
+
+    $language = new Language(array('name' => 'French', 'langcode' => 'fr'));
+    language_save($language);
 
     $edit = array(
       'human_name' => $this->randomName(),
       'tag' => $this->randomName(),
       'description' => $this->randomName(30),
+      'langcode' => 'fr',
     );
 
     $this->drupalPost("admin/structure/views/nojs/edit-details/$view_name/default", $edit, t('Apply'));
     $this->drupalPost(NULL, array(), t('Save'));
 
     $view = views_get_view($view_name);
-    foreach (array('human_name', 'tag', 'description') as $property) {
+    foreach (array('human_name', 'tag', 'description', 'langcode') as $property) {
       $this->assertEqual($view->storage->get($property), $edit[$property], format_string('Make sure the property @property got probably saved.', array('@property' => $property)));
     }
   }

core/modules/views/lib/Drupal/views/Tests/Wizard/WizardPluginBaseUnitTest.php

+<?php
+
+/**
+ * @file
+ * Contains \Drupal\views\Tests\Wizard\WizardPluginBaseUnitTest.
+ */
+
+namespace Drupal\views\Tests\Wizard;
+
+use Drupal\Core\Language\Language;
+use Drupal\views\Tests\ViewUnitTestBase;
+use Drupal\views_ui\ViewUI;
+
+/**
+ * Tests the wizard code.
+ *
+ * @see \Drupal\views\Plugin\views\wizard\WizardPluginBase
+ */
+class WizardPluginBaseUnitTest extends ViewUnitTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('language', 'system');
+
+  /**
+   * Contains thw wizard plugin manager.
+   *
+   * @var \Drupal\views\Plugin\views\wizard\WizardPluginBase
+   */
+  protected $wizard;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Wizard Plugin Base',
+      'description' => 'Test the wizard base plugin class',
+      'group' => 'Views Wizard',
+    );
+  }
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installSchema('language', 'language');
+    $this->installSchema('system', 'variable');
+
+    $this->wizard = $this->container->get('plugin.manager.views.wizard')->createInstance('standard:views_test_data', array());
+  }
+
+  /**
+   * Tests the creating of a view.
+   *
+   * @see \Drupal\views\Plugin\views\wizard\WizardPluginBase
+   */
+  public function testCreateView() {
+    $form = array();
+    $form_state = array();
+    $form = $this->wizard->build_form($form, $form_state);
+    $random_id = strtolower($this->randomName());
+    $random_human_name = $this->randomName();
+    $random_description = $this->randomName();
+
+    // Add a new language and mark it as default.
+    $language = new Language(array(
+      'langcode' => 'it',
+      'name' => 'Italian',
+      'default' => TRUE,
+    ));
+    language_save($language);
+
+    $form_state['values'] = array(
+      'id' => $random_id,
+      'human_name' => $random_human_name,
+      'description' => $random_description,
+      'base_table' => 'views_test_data',
+    );
+
+    $this->wizard->validateView($form, $form_state);
+    $view = $this->wizard->create_view($form, $form_state);
+    $this->assertTrue($view instanceof ViewUI, 'The created view is a ViewUI object.');
+    $this->assertEqual($view->get('id'), $random_id);
+    $this->assertEqual($view->get('human_name'), $random_human_name);
+    $this->assertEqual($view->get('description'), $random_description);
+    $this->assertEqual($view->get('base_table'), 'views_test_data');
+    $this->assertEqual($view->get('langcode'), 'it');
+  }
+}
+

core/modules/views/views_ui/lib/Drupal/views_ui/Form/Ajax/EditDetails.php

@@ -47,6 +47,12 @@ public function buildForm(array $form, array &$form_state) {
       '#description' => t('A descriptive human-readable name for this view. Spaces are allowed'),
       '#default_value' => $view->getHumanName(),
     );
+    $form['details']['langcode'] = array(
+      '#type' => 'language_select',
+      '#title' => t('View language'),
+      '#description' => t('Language of labels and other textual elements in this view.'),
+      '#default_value' => $view->get('langcode'),
+    );
     $form['details']['tag'] = array(
       '#type' => 'textfield',
       '#title' => t('View tag'),