add getter for inLanguage in base event transformer

includes/activitypub/transformer/class-event.php

@@ -78,6 +78,15 @@ class Event extends Post {
 		}
 	}
 
+	/**
+	 * Returns the locale of the event.
+	 *
+	 * @return string
+	 */
+	public function get_in_language() {
+		return $this->get_locale();
+	}
+
 	/**
 	 * Generic function that converts an WP-Event object to an ActivityPub-Event object.
 	 *