diff --git a/content/ja/docs/contribute/localization.md b/content/ja/docs/contribute/localization.md
index bffea11697..ab1639c294 100644
--- a/content/ja/docs/contribute/localization.md
+++ b/content/ja/docs/contribute/localization.md
@@ -106,6 +106,8 @@ GitHub | GitHub (ママ表記)
 registry | レジストリ
 architecture | アーキテクチャ
 secure | セキュア
+stacked | 積層(例: stacked etcd clusterは積層etcdクラスター)
+a set of ~ | ～の集合
 
 ### 備考