support user custom exchange rates data

src/locales/ja.json

@@ -1171,6 +1171,9 @@
         "invalid beancount file": "Invalid Beancount file",
         "not support include directive for beancount file": "Not support \"include\" directive for Beancount file",
         "invalid amount expression": "Amount expression is invalid",
+        "user custom exchange rate data not found": "User custom exchange rate data is not found",
+        "cannot update exchange rate data for base currency": "Cannot update exchange rate data for base currency",
+        "cannot delete exchange rate data for base currency": "Cannot delete exchange rate data for base currency",
         "query items cannot be blank": "クエリ項目がありません",
         "query items too much": "クエリ項目が多すぎます",
         "query items have invalid item": "クエリ項目に無効な項目があります",
@@ -2039,6 +2042,7 @@
     "WebAuthn is not enabled": "WebAuthnが有効になっていません",
     "Are you sure you want to re-login?": "再ログインしますか?",
     "Exchange Rates Data": "為替レートデータ",
+    "User Custom": "User Custom",
     "Base Currency": "ベース通貨",
     "Base Amount": "ベース金額",
     "Set as Base": "ベースとして設定",
@@ -2049,6 +2053,11 @@
     "Exchange rates data has been updated": "為替レートデータが更新されました",
     "Exchange rates data is up to date": "為替レートデータは最新です",
     "Unable to retrieve exchange rates data": "為替レートデータを取得できません",
+    "Update User Custom Exchange Rate": "Update User Custom Exchange Rate",
+    "You have updated exchange rate": "You have updated exchange rate",
+    "Unable to update user custom exchange rate": "Unable to update user custom exchange rate",
+    "Are you sure you want to delete this user custom exchange rate?": "Are you sure you want to delete this user custom exchange rate?",
+    "Unable to delete this user custom exchange rate": "Unable to delete this user custom exchange rate",
     "Use on Mobile Device": "モバイルデバイスで使う",
     "You can scan the QR code below on your mobile device.": "以下のQRコードをモバイルデバイスでスキャンできます。",
     "Switch to Mobile Version": "モバイルバージョンに切り替え",