chore: Update translations from Crowdin (#6283)

app/javascript/dashboard/i18n/locale/ja/conversation.json

@@ -35,6 +35,7 @@
     "REMOVE_SELECTION": "選択項目を削除",
     "DOWNLOAD": "ダウンロード",
     "UNKNOWN_FILE_TYPE": "不明なファイル",
+    "SAVE_CONTACT": "Save",
     "UPLOADING_ATTACHMENTS": "添付ファイルをアップロード中...",
     "SUCCESS_DELETE_MESSAGE": "メッセージの削除に成功",
     "FAIL_DELETE_MESSSAGE": "メッセージを削除できませんでした！もう一度お試しください",
@@ -132,6 +133,14 @@
           "PLACEHOLDER": "Emails separated by commas",
           "ERROR": "Please enter valid email addresses"
         }
+      },
+      "UNDEFINED_VARIABLES": {
+        "TITLE": "Undefined variables",
+        "MESSAGE": "You have {undefinedVariablesCount} undefined variables in your message: {undefinedVariables}. Would you like to send the message anyway?",
+        "CONFIRM": {
+          "YES": "送信",
+          "CANCEL": "キャンセル"
+        }
       }
     },
     "VISIBLE_TO_AGENTS": "非公開設定の注意：あなたとあなたのチームのみに表示されます",