Issue #2346101 by realityloop: Fixed Alternate text should be called Alternative text.

core/modules/image/config/schema/image.data_types.schema.yml

@@ -18,7 +18,7 @@ field_default_image:
       label: 'Image'
     alt:
       type: label
-      label: 'Alternate text'
+      label: 'Alternative text'
     title:
       type: label
       label: 'Title'

core/modules/image/config/schema/image.schema.yml

@@ -123,7 +123,7 @@ field.image.value:
           label: 'File ID'
         alt:
           type: string
-          label: 'Alternate text'
+          label: 'Alternative text'
         title:
           type: string
           label: 'Title text'

core/modules/image/src/Plugin/Field/FieldType/ImageItem.php

@@ -411,7 +411,7 @@ protected function defaultImageForm(array &$element, array $settings) {
     );
     $element['default_image']['alt'] = array(
       '#type' => 'textfield',
-      '#title' => t('Alternate text'),
+      '#title' => t('Alternative text'),
       '#description' => t('This text will be used by screen readers, search engines, and when the image cannot be loaded.'),
       '#default_value' => $settings['default_image']['alt'],
       '#maxlength' => 512,

core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php

@@ -221,7 +221,7 @@ public static function process($element, FormStateInterface $form_state, $form)
 
     // Add the additional alt and title fields.
     $element['alt'] = array(
-      '#title' => t('Alternate text'),
+      '#title' => t('Alternative text'),
       '#type' => 'textfield',
       '#default_value' => isset($item['alt']) ? $item['alt'] : '',
       '#description' => t('This text will be used by screen readers, search engines, or when the image cannot be loaded.'),

core/modules/image/src/Tests/ImageFieldDisplayTest.php

@@ -231,7 +231,7 @@ function testImageFieldSettings() {
     );
     $this->drupalPostForm('node/' . $nid . '/edit', $edit, t('Save and keep published'));
     $schema = $field->getFieldStorageDefinition()->getSchema();
-    $this->assertRaw(t('Alternate text cannot be longer than %max characters but is currently %length characters long.', array(
+    $this->assertRaw(t('Alternative text cannot be longer than %max characters but is currently %length characters long.', array(
       '%max' => $schema['columns']['alt']['length'],
       '%length' => $test_size,
     )));

core/modules/image/src/Tests/ImageFieldValidateTest.php

@@ -65,7 +65,7 @@ function testRequiredAttributes() {
     // Let's just use the first image.
     $image = $images[0];
     $this->uploadNodeImage($image, $field_name, 'article');
-    $this->assertText(t('The field Alternate text is required'), 'Node save failed when alt text required was set and alt text was left empty.');
+    $this->assertText(t('The field Alternative text is required'), 'Node save failed when alt text required was set and alt text was left empty.');
     $this->assertText(t('The field Title is required'), 'Node save failed when title text required was set and title text was left empty.');
   }
 }

core/modules/image/templates/image-style.html.twig

@@ -10,7 +10,7 @@
  *   - width: The width of the image (if known).
  *   - height: The height of the image (if known).
  *   - title: The title of the image.
- *   - alt: The alternate text for the image.
+ *   - alt: The alternative text for the image.
  *
  * @see template_preprocess_image_style()
  *