diff --git a/core/lib/Drupal/Core/Annotation/Translation.php b/core/lib/Drupal/Core/Annotation/Translation.php
index 0d6acd1..9af350e 100644
--- a/core/lib/Drupal/Core/Annotation/Translation.php
+++ b/core/lib/Drupal/Core/Annotation/Translation.php
@@ -10,6 +10,28 @@
 use Drupal\Component\Annotation\AnnotationInterface;
 
 /**
+ * @defgroup plugin_translatable Translatable plugin metadata
+ *
+ * @{
+ * When providing plugin annotation, properties whose values are displayed in
+ * the user interface should be made translatable. Much the same as how user
+ * interface text elsewhere is wrapped in t() to make it translatable, in plugin
+ * annotation, wrap translatable strings in the @ Translation() annotation.
+ * For example:
+ * @code
+ *   title = @ Translation("Title of the plugin"),
+ * @endcode
+ * Remove spaces after @ in your actual plugin - these are put into this sample
+ * code so that it is not recognized as annotation.
+ *
+ * You will also need to make sure that your class file includes the line:
+ * @code
+ *   use Drupal\Core\Annotation\Translation;
+ * @endcode
+ * @}
+ */
+
+/**
  * Defines a translatable annotation object.
  *
  * Some metadata within an annotation needs to be translatable. This class
@@ -18,6 +40,8 @@
  * around the traditional t() function in drupal.
  *
  * @Annotation
+ *
+ * @ingroup translatable_plugin_definition
  */
 class Translation implements AnnotationInterface {
 
diff --git a/core/lib/Drupal/Core/Entity/Annotation/EntityType.php b/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
index 0487d03..38ed5fa 100644
--- a/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
+++ b/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
@@ -94,14 +94,18 @@ class EntityType extends Plugin {
   /**
    * The human-readable name of the type.
    *
-   * @var string
+   * @ingroup plugin_translatable
+   *
+   * @var \Drupal\Core\Annotation\Translation
    */
   public $label;
 
   /**
    * The human-readable name of the entity bundles, e.g. Vocabulary.
    *
-   * @var string
+   * @ingroup plugin_translatable
+   *
+   * @var \Drupal\Core\Annotation\Translation
    */
   public $bundle_label;