diff --git a/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php b/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
index 2f9a78d..9c51149 100644
--- a/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
+++ b/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
@@ -112,7 +112,7 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
       '#maxlength' => 8,
       '#min' => 1,
       '#max' => 99999,
-      '#placeholder' => 'width',
+      '#placeholder' => $this->t('width'),
       '#field_suffix' => ' x ',
       '#parents' => array('attributes', 'width'),
     );
@@ -125,7 +125,7 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
       '#maxlength' => 8,
       '#min' => 1,
       '#max' => 99999,
-      '#placeholder' => 'height',
+      '#placeholder' => $this->t('height'),
       '#field_suffix' => 'pixels',
       '#parents' => array('attributes', 'height'),
     );