diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php b/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
index c1771bb..f8d6e82 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Form/TranslatableForm.php
@@ -43,10 +43,10 @@ public function getFormID() {
    */
   public function getQuestion() {
     if ($this->fieldInfo['translatable']) {
-      $question = t('Are you sure you want to disable translation for the %name field?', array('%name' => $this->fieldName));
+      $question = $this->t('Are you sure you want to disable translation for the %name field?', array('%name' => $this->fieldName));
     }
     else {
-      $question = t('Are you sure you want to enable translation for the %name field?', array('%name' => $this->fieldName));
+      $question = $this->t('Are you sure you want to enable translation for the %name field?', array('%name' => $this->fieldName));
     }
     return $question;
   }
@@ -55,10 +55,10 @@ public function getQuestion() {
    * {@inheritdoc}
    */
   public function getDescription() {
-    $description = t('By submitting this form these changes will apply to the %name field everywhere it is used.',
+    $description = $this->t('By submitting this form these changes will apply to the %name field everywhere it is used.',
       array('%name' => $this->fieldName)
     );
-    $description .= $this->fieldInfo['translatable'] ? "<br>" . t("<strong>All the existing translations of this field will be deleted.</strong><br>This action cannot be undone.") : '';
+    $description .= $this->fieldInfo['translatable'] ? "<br>" . $this->t("<strong>All the existing translations of this field will be deleted.</strong><br>This action cannot be undone.") : '';
     return $description;
   }
 
@@ -106,13 +106,13 @@ public function submitForm(array &$form, array &$form_state) {
     if ($this->fieldInfo['translatable'] !== $translatable) {
       // Field translatability has changed since form creation, abort.
       $msg = $translatable ?
-        t('The field %field_name is already translatable. No change was performed.', $t_args):
-        t('The field %field_name is already untranslatable. No change was performed.', $t_args);
+        $this->t('The field %field_name is already translatable. No change was performed.', $t_args):
+        $this->t('The field %field_name is already untranslatable. No change was performed.', $t_args);
       drupal_set_message($msg, 'warning');
       return;
     }
 
-    $title = !$translatable ? t('Enabling translation for the %field_name field', $t_args) : t('Disabling translation for the %field_name field', $t_args);
+    $title = !$translatable ? $this->t('Enabling translation for the %field_name field', $t_args) : $this->t('Disabling translation for the %field_name field', $t_args);
 
     // If a field is untranslatable, it can have no data except under
     // Language::LANGCODE_NOT_SPECIFIED. Thus we need a field to be translatable