apply i18n

resource/locales/en_US/translation.json

@@ -111,7 +111,7 @@
   "Notification Settings": "Notification Settings",
   "slack_integration": "Slack Integration",
   "External_Notification": "External Notification",
-  "Legacy_External_Notification": "Legacy External Notification",
+  "Legacy_Slack_Integration": "Legacy_Slack_Integration",
   "User_Management": "User Management",
   "external_account_management": "External Account Management",
   "UserGroup Management": "UserGroup Management",

resource/locales/ja_JP/translation.json

@@ -112,7 +112,7 @@
   "Notification Settings": "通知設定",
   "slack_integration": "Slack連携",
   "External_Notification": "外部ツールへの通知",
-  "Legacy_External_Notification": "外部ツールへの通知 (レガシー)",
+  "Legacy_Slack_Integration": "Slack連携 (レガシー)",
   "User_Management": "ユーザー管理",
   "external_account_management": "外部アカウント管理",
   "UserGroup Management": "グループ管理",

resource/locales/zh_CN/translation.json

@@ -120,7 +120,7 @@
 	"Notification Settings": "通知设置",
   "slack_integration": "Slack一体化",
   "External_Notification": "外部通知",
-  "Legacy_External_Notification": "旧版外部通知",
+  "Legacy_Slack_Integration": "旧版Slack一体化",
 	"User_Management": "用户管理",
 	"external_account_management": "外部账户管理",
 	"UserGroup Management": "用户组管理",