Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/locale/src/LocaleEvents.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\locale\LocaleEvents.
+ */
+
+namespace Drupal\locale;
+
+/**
+ * Defines events for locale translation.
+ *
+ * @see \Drupal\Core\Config\ConfigCrudEvent
+ */
+final class LocaleEvents {
+
+  /**
+   * The name of the event fired when saving a translated string.
+   *
+   * This event allows you to perform custom actions whenever a translated
+   * string is saved.
+   *
+   * @Event
+   *
+   * @see \Drupal\locale\EventSubscriber\LocaleTranslationCacheTag
+   */
+  const SAVE_TRANSLATION = 'locale.save_translation';
+
+}