diff --git a/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php b/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
index 315c918..73a8516 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayModeDeleteForm.php
@@ -28,7 +28,7 @@ public function getCancelUrl() {
    */
   public function getQuestion() {
     $entity_type = $this->entity->getEntityType();
-    return t('Are you sure you want to delete the %label @entity-type?', array('%label' => $this->entity->label(), '@entity-type' => $entity_type->getLowercaseLabel()));
+    return $this->t('Are you sure you want to delete the %label @entity-type?', array('%label' => $this->entity->label(), '@entity-type' => $entity_type->getLowercaseLabel()));
   }
 
   /**
@@ -36,14 +36,14 @@ public function getQuestion() {
    */
   public function getDescription() {
     $entity_type = $this->entity->getEntityType();
-    return t('Deleting a @entity-type will cause any output still requesting to use that @entity-type to use the default display settings.', array('@entity-type' => $entity_type->getLowercaseLabel()));
+    return $this->t('Deleting a @entity-type will cause any output still requesting to use that @entity-type to use the default display settings.', array('@entity-type' => $entity_type->getLowercaseLabel()));
   }
 
   /**
    * {@inheritdoc}
    */
   public function getConfirmText() {
-    return t('Delete');
+    return $this->t('Delete');
   }
 
   /**
@@ -51,7 +51,7 @@ public function getConfirmText() {
    */
   public function submitForm(array &$form, FormStateInterface $form_state) {
     $entity_type = $this->entity->getEntityType();
-    drupal_set_message(t('Deleted the %label @entity-type.', array('%label' => $this->entity->label(), '@entity-type' => strtolower($entity_type->getLabel()))));
+    drupal_set_message($this->t('Deleted the %label @entity-type.', array('%label' => $this->entity->label(), '@entity-type' => strtolower($entity_type->getLabel()))));
     $this->entity->delete();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     $form_state->setRedirectUrl($this->getCancelUrl());
diff --git a/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php b/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
index 9b7fdd2..2f361eb 100644
--- a/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
+++ b/core/modules/field_ui/src/Form/EntityDisplayModeFormBase.php
@@ -76,14 +76,14 @@ protected function init(FormStateInterface $form_state) {
   public function form(array $form, FormStateInterface $form_state) {
     $form['label'] = array(
       '#type' => 'textfield',
-      '#title' => t('Name'),
+      '#title' => $this->t('Name'),
       '#maxlength' => 100,
       '#default_value' => $this->entity->label(),
     );
 
     $form['id'] = array(
       '#type' => 'machine_name',
-      '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
+      '#description' => $this->t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
       '#disabled' => !$this->entity->isNew(),
       '#default_value' => $this->entity->id(),
       '#field_prefix' => $this->entity->isNew() ? $this->entity->getTargetType() . '.' : '',
@@ -122,7 +122,7 @@ public function exists($entity_id, array $element) {
    * {@inheritdoc}
    */
   public function save(array $form, FormStateInterface $form_state) {
-    drupal_set_message(t('Saved the %label @entity-type.', array('%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel())));
+    drupal_set_message($this->t('Saved the %label @entity-type.', array('%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel())));
     $this->entity->save();
     \Drupal::entityManager()->clearCachedFieldDefinitions();
     $form_state->setRedirect('field_ui.' . $this->entity->getEntityTypeId() . '_list');