diff --git a/lang/ja/entities.php b/lang/ja/entities.php
index bffcd4105..eda30371b 100644
--- a/lang/ja/entities.php
+++ b/lang/ja/entities.php
@@ -224,6 +224,8 @@ return [
     'pages_edit_switch_to_markdown_clean' => '(クリーンなコンテンツ)',
     'pages_edit_switch_to_markdown_stable' => '(安定したコンテンツ)',
     'pages_edit_switch_to_wysiwyg' => 'WYSIWYGエディタに切り替え',
+    'pages_edit_switch_to_new_wysiwyg' => 'Switch to new WYSIWYG',
+    'pages_edit_switch_to_new_wysiwyg_desc' => '(In Alpha Testing)',
     'pages_edit_set_changelog' => '編集内容についての説明',
     'pages_edit_enter_changelog_desc' => 'どのような変更を行ったのかを記録してください',
     'pages_edit_enter_changelog' => '編集内容を入力',