I added the Japanese message catalog to the swagger node. It can also solve the following error when Node-RED starts in the Japanese browser environment.
12 Nov 16:31:19 - [info] フローを開始します
12 Nov 16:31:19 - [info] フローを開始しました
12 Nov 16:31:19 - [info] サーバは http://127.0.0.1:1880/ で実行中です
Error: ENOENT: no such file or directory, stat '/Users/yokoi/.node-red/node_modules/node-red-node-swagger/swagger/locales/ja/swagger.json'
I added the Japanese message catalog to the swagger node. It can also solve the following error when Node-RED starts in the Japanese browser environment.