diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/edit-tag-messages.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-admin/includes/edit-tag-messages.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,58 @@
+<?php
+/**
+ * Edit Tags Administration: Messages
+ *
+ * @package WordPress
+ * @subpackage Administration
+ * @since 4.4.0
+ */
+
+$messages = array();
+// 0 = unused. Messages start at index 1.
+$messages['_item'] = array(
+	0 => '',
+	1 => __( 'Item added.' ),
+	2 => __( 'Item deleted.' ),
+	3 => __( 'Item updated.' ),
+	4 => __( 'Item not added.' ),
+	5 => __( 'Item not updated.' ),
+	6 => __( 'Items deleted.' ),
+);
+
+$messages['category'] = array(
+	0 => '',
+	1 => __( 'Category added.' ),
+	2 => __( 'Category deleted.' ),
+	3 => __( 'Category updated.' ),
+	4 => __( 'Category not added.' ),
+	5 => __( 'Category not updated.' ),
+	6 => __( 'Categories deleted.' ),
+);
+
+$messages['post_tag'] = array(
+	0 => '',
+	1 => __( 'Tag added.' ),
+	2 => __( 'Tag deleted.' ),
+	3 => __( 'Tag updated.' ),
+	4 => __( 'Tag not added.' ),
+	5 => __( 'Tag not updated.' ),
+	6 => __( 'Tags deleted.' ),
+);
+
+/**
+ * Filters the messages displayed when a tag is updated.
+ *
+ * @since 3.7.0
+ *
+ * @param array $messages The messages to be displayed.
+ */
+$messages = apply_filters( 'term_updated_messages', $messages );
+
+$message = false;
+if ( isset( $_REQUEST['message'] ) && ( $msg = (int) $_REQUEST['message'] ) ) {
+	if ( isset( $messages[ $taxonomy ][ $msg ] ) ) {
+		$message = $messages[ $taxonomy ][ $msg ];
+	} elseif ( ! isset( $messages[ $taxonomy ] ) && isset( $messages['_item'][ $msg ] ) ) {
+		$message = $messages['_item'][ $msg ];
+	}
+}
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