diff --git a/public/locales/de.json b/public/locales/de.json
index a4c02b1d..aa25f0ce 100644
--- a/public/locales/de.json
+++ b/public/locales/de.json
@@ -139,12 +139,41 @@
         "no_key_message": "Sie haben noch keinen API-Schlüssel generiert.",
         "generate_button": "API-Schlüssel generieren",
         "notifications": {
-            "fetch_error": "API-Schlüssel konnte nicht abgerufen werden - ${error}",
-            "generate_success": "API-Schlüssel erfolgreich generiert",
-            "generate_error": "API-Schlüssel konnte nicht generiert werden - ${error}",
-            "delete_success": "API-Schlüssel erfolgreich gelöscht",
-            "delete_error": "API-Schlüssel konnte nicht gelöscht werden - ${error}",
-            "copy_success": "API-Schlüssel erfolgreich kopiert"
+            "errors": {
+                "fetch": {
+                    "network": "Netzwerkfehler beim Abrufen des API-Schlüssels: ${error}",
+                    "unauthorized": "Sie müssen angemeldet sein, um auf den API-Schlüssel zuzugreifen",
+                    "not_found": "API-Schlüssel für Ihr Konto wurde nicht gefunden",
+                    "server": "Serverfehler beim Abrufen des API-Schlüssels. Bitte versuchen Sie es später erneut",
+                    "unknown": "Unbekannter Fehler beim Abrufen des API-Schlüssels: ${error}"
+                },
+                "generate": {
+                    "network": "Netzwerkfehler bei der Generierung des API-Schlüssels: ${error}",
+                    "unauthorized": "Sie müssen angemeldet sein, um einen API-Schlüssel zu generieren",
+                    "key_exists": "Sie haben bereits einen API-Schlüssel. Bitte löschen Sie zuerst den vorhandenen",
+                    "not_found": "Benutzerkonto nicht gefunden",
+                    "server": "Serverfehler bei der Generierung des API-Schlüssels. Bitte versuchen Sie es später erneut",
+                    "unknown": "Unbekannter Fehler bei der Generierung des API-Schlüssels: ${error}"
+                },
+                "delete": {
+                    "network": "Netzwerkfehler beim Löschen des API-Schlüssels: ${error}",
+                    "unauthorized": "Sie müssen angemeldet sein, um den API-Schlüssel zu löschen",
+                    "not_found": "Benutzerkonto nicht gefunden",
+                    "key_not_found": "Kein API-Schlüssel zum Löschen gefunden",
+                    "server": "Serverfehler beim Löschen des API-Schlüssels. Bitte versuchen Sie es später erneut",
+                    "unknown": "Unbekannter Fehler beim Löschen des API-Schlüssels: ${error}"
+                },
+                "copy": {
+                    "failed": "Fehler beim Kopieren des API-Schlüssels in die Zwischenablage",
+                    "no_key": "Kein API-Schlüssel zum Kopieren verfügbar"
+                }
+            },
+            "success": {
+                "fetch": "API-Schlüssel erfolgreich abgerufen",
+                "generate": "Neuer API-Schlüssel erfolgreich generiert",
+                "delete": "API-Schlüssel erfolgreich gelöscht",
+                "copy": "API-Schlüssel in die Zwischenablage kopiert"
+            }
         }
     },
     "action_description": {
diff --git a/public/locales/en.json b/public/locales/en.json
index f072dcc9..0cf1cf35 100644
--- a/public/locales/en.json
+++ b/public/locales/en.json
@@ -140,12 +140,41 @@
       "no_key_message": "You haven't generated an API key yet.",
       "generate_button": "Generate API Key",
       "notifications": {
-        "fetch_error": "Failed to fetch API Key - ${error}",
-        "generate_success": "Generated API Key successfully",
-        "generate_error": "Failed to generate API Key - ${error}",
-        "delete_success": "API Key deleted successfully",
-        "delete_error": "Failed to delete API Key - ${error}",
-        "copy_success": "Copied API Key successfully"
+        "errors": {
+          "fetch": {
+            "network": "Network error while fetching API key: ${error}",
+            "unauthorized": "You must be logged in to access API key",
+            "not_found": "Unable to find API key for your account",
+            "server": "Server error while fetching API key. Please try again later",
+            "unknown": "Unknown error occurred while fetching API key: ${error}"
+          },
+          "generate": {
+            "network": "Network error while generating API key: ${error}",
+            "unauthorized": "You must be logged in to generate an API key",
+            "key_exists": "You already have an API key. Please delete the existing one first",
+            "not_found": "User account not found",
+            "server": "Server error while generating API key. Please try again later",
+            "unknown": "Unknown error occurred while generating API key: ${error}"
+          },
+          "delete": {
+            "network": "Network error while deleting API key: ${error}",
+            "unauthorized": "You must be logged in to delete API key",
+            "not_found": "User account not found",
+            "key_not_found": "No API key found to delete",
+            "server": "Server error while deleting API key. Please try again later",
+            "unknown": "Unknown error occurred while deleting API key: ${error}"
+          },
+          "copy": {
+            "failed": "Failed to copy API key to clipboard",
+            "no_key": "No API key available to copy"
+          }
+        },
+        "success": {
+          "fetch": "API key retrieved successfully",
+          "generate": "New API key generated successfully",
+          "delete": "API key deleted successfully",
+          "copy": "API key copied to clipboard"
+        }
       }
     },
     "action_description": {
diff --git a/public/locales/es.json b/public/locales/es.json
index 09f6d703..fb0c4e54 100644
--- a/public/locales/es.json
+++ b/public/locales/es.json
@@ -140,12 +140,41 @@
     "no_key_message": "Aún no has generado una clave API.",
     "generate_button": "Generar Clave API",
     "notifications": {
-      "fetch_error": "Error al obtener la clave API - ${error}",
-      "generate_success": "Clave API generada con éxito",
-      "generate_error": "Error al generar la clave API - ${error}",
-      "delete_success": "Clave API eliminada con éxito",
-      "delete_error": "Error al eliminar la clave API - ${error}",
-      "copy_success": "Clave API copiada con éxito"
+      "errors": {
+        "fetch": {
+          "network": "Error de red al obtener la clave API: ${error}",
+          "unauthorized": "Debes iniciar sesión para acceder a la clave API",
+          "not_found": "No se pudo encontrar la clave API para tu cuenta",
+          "server": "Error del servidor al obtener la clave API. Por favor, inténtalo más tarde",
+          "unknown": "Error desconocido al obtener la clave API: ${error}"
+        },
+        "generate": {
+          "network": "Error de red al generar la clave API: ${error}",
+          "unauthorized": "Debes iniciar sesión para generar una clave API",
+          "key_exists": "Ya tienes una clave API. Por favor, elimina la existente primero",
+          "not_found": "Cuenta de usuario no encontrada",
+          "server": "Error del servidor al generar la clave API. Por favor, inténtalo más tarde",
+          "unknown": "Error desconocido al generar la clave API: ${error}"
+        },
+        "delete": {
+          "network": "Error de red al eliminar la clave API: ${error}",
+          "unauthorized": "Debes iniciar sesión para eliminar la clave API",
+          "not_found": "Cuenta de usuario no encontrada",
+          "key_not_found": "No se encontró ninguna clave API para eliminar",
+          "server": "Error del servidor al eliminar la clave API. Por favor, inténtalo más tarde",
+          "unknown": "Error desconocido al eliminar la clave API: ${error}"
+        },
+        "copy": {
+          "failed": "Error al copiar la clave API al portapapeles",
+          "no_key": "No hay clave API disponible para copiar"
+        }
+      },
+      "success": {
+        "fetch": "Clave API obtenida exitosamente",
+        "generate": "Nueva clave API generada exitosamente",
+        "delete": "Clave API eliminada exitosamente",
+        "copy": "Clave API copiada al portapapeles"
+      }
     }
   },
   "action_description": {
diff --git a/public/locales/ja.json b/public/locales/ja.json
index d2fe42ea..9f852836 100644
--- a/public/locales/ja.json
+++ b/public/locales/ja.json
@@ -140,12 +140,41 @@
         "no_key_message": "APIキーはまだ生成されていません。",
         "generate_button": "APIキーを生成",
         "notifications": {
-            "fetch_error": "APIキーの取得に失敗しました - ${error}",
-            "generate_success": "APIキーが正常に生成されました",
-            "generate_error": "APIキーの生成に失敗しました - ${error}",
-            "delete_success": "APIキーが正常に削除されました",
-            "delete_error": "APIキーの削除に失敗しました - ${error}",
-            "copy_success": "APIキーがコピーされました"
+            "errors": {
+                "fetch": {
+                    "network": "APIキーの取得中にネットワークエラーが発生しました：${error}",
+                    "unauthorized": "APIキーにアクセスするにはログインが必要です",
+                    "not_found": "アカウントのAPIキーが見つかりません",
+                    "server": "APIキーの取得中にサーバーエラーが発生しました。後でもう一度お試しください",
+                    "unknown": "APIキーの取得中に不明なエラーが発生しました：${error}"
+                },
+                "generate": {
+                    "network": "APIキーの生成中にネットワークエラーが発生しました：${error}",
+                    "unauthorized": "APIキーを生成するにはログインが必要です",
+                    "key_exists": "APIキーが既に存在します。既存のキーを先に削除してください",
+                    "not_found": "ユーザーアカウントが見つかりません",
+                    "server": "APIキーの生成中にサーバーエラーが発生しました。後でもう一度お試しください",
+                    "unknown": "APIキーの生成中に不明なエラーが発生しました：${error}"
+                },
+                "delete": {
+                    "network": "APIキーの削除中にネットワークエラーが発生しました：${error}",
+                    "unauthorized": "APIキーを削除するにはログインが必要です",
+                    "not_found": "ユーザーアカウントが見つかりません",
+                    "key_not_found": "削除するAPIキーが見つかりません",
+                    "server": "APIキーの削除中にサーバーエラーが発生しました。後でもう一度お試しください",
+                    "unknown": "APIキーの削除中に不明なエラーが発生しました：${error}"
+                },
+                "copy": {
+                    "failed": "APIキーのクリップボードへのコピーに失敗しました",
+                    "no_key": "コピーできるAPIキーがありません"
+                }
+            },
+            "success": {
+                "fetch": "APIキーの取得に成功しました",
+                "generate": "新しいAPIキーの生成に成功しました",
+                "delete": "APIキーの削除に成功しました",
+                "copy": "APIキーをクリップボードにコピーしました"
+            }
         }
     },
     "action_description": {
diff --git a/public/locales/zh.json b/public/locales/zh.json
index e7c58660..80fec31e 100644
--- a/public/locales/zh.json
+++ b/public/locales/zh.json
@@ -140,12 +140,41 @@
     "no_key_message": "您还未生成API密钥。",
     "generate_button": "生成API密钥",
     "notifications": {
-      "fetch_error": "获取API密钥失败 - ${error}",
-      "generate_success": "API密钥生成成功",
-      "generate_error": "生成API密钥失败 - ${error}",
-      "delete_success": "API密钥删除成功",
-      "delete_error": "删除API密钥失败 - ${error}",
-      "copy_success": "API密钥复制成功"
+      "errors": {
+        "fetch": {
+          "network": "获取API密钥时发生网络错误：${error}",
+          "unauthorized": "您必须登录才能访问API密钥",
+          "not_found": "找不到您账户的API密钥",
+          "server": "获取API密钥时发生服务器错误。请稍后重试",
+          "unknown": "获取API密钥时发生未知错误：${error}"
+        },
+        "generate": {
+          "network": "生成API密钥时发生网络错误：${error}",
+          "unauthorized": "您必须登录才能生成API密钥",
+          "key_exists": "您已经有一个API密钥。请先删除现有的密钥",
+          "not_found": "找不到用户账户",
+          "server": "生成API密钥时发生服务器错误。请稍后重试",
+          "unknown": "生成API密钥时发生未知错误：${error}"
+        },
+        "delete": {
+          "network": "删除API密钥时发生网络错误：${error}",
+          "unauthorized": "您必须登录才能删除API密钥",
+          "not_found": "找不到用户账户",
+          "key_not_found": "找不到要删除的API密钥",
+          "server": "删除API密钥时发生服务器错误。请稍后重试",
+          "unknown": "删除API密钥时发生未知错误：${error}"
+        },
+        "copy": {
+          "failed": "复制API密钥到剪贴板失败",
+          "no_key": "没有可复制的API密钥"
+        }
+      },
+      "success": {
+        "fetch": "成功获取API密钥",
+        "generate": "成功生成新的API密钥",
+        "delete": "成功删除API密钥",
+        "copy": "已将API密钥复制到剪贴板"
+      }
     }
   },
   "action_description": {