diff --git a/core/modules/editor/editor.admin.inc b/core/modules/editor/editor.admin.inc
index 9dc6a30464572c83785bf20d9688e61df6188bbb..911accc8f2986b27c55e5364b2fa69875e1f4100 100644
--- a/core/modules/editor/editor.admin.inc
+++ b/core/modules/editor/editor.admin.inc
@@ -109,7 +109,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#maxlength' => 8,
     '#min' => 1,
     '#max' => 99999,
-    '#placeholder' => 'width',
+    '#placeholder' => t('width'),
     '#field_suffix' => ' x ',
     '#states' => $show_if_image_uploads_enabled,
   );
@@ -122,8 +122,8 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#maxlength' => 8,
     '#min' => 1,
     '#max' => 99999,
-    '#placeholder' => 'height',
-    '#field_suffix' => 'pixels',
+    '#placeholder' => t('height'),
+    '#field_suffix' => t('pixels'),
     '#states' => $show_if_image_uploads_enabled,
   );
 
diff --git a/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php b/core/modules/editor/lib/Drupal/editor/Form/EditorImageDialog.php
index 2f9a78d43444b937ff0ca0644f43f48b43e99a07..5eb787cf08c1c13367b789f008868aab1e2ec91c 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'),
     );
@@ -125,8 +125,8 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
       '#maxlength' => 8,
       '#min' => 1,
       '#max' => 99999,
-      '#placeholder' => 'height',
-      '#field_suffix' => 'pixels',
+      '#placeholder' => $this->t('height'),
+      '#field_suffix' => $this->t('pixels'),
       '#parents' => array('attributes', 'height'),
     );