diff --git a/backend/src/PnvPanel.Api/Program.cs b/backend/src/PnvPanel.Api/Program.cs
index c0f341e..5ebc504 100644
--- a/backend/src/PnvPanel.Api/Program.cs
+++ b/backend/src/PnvPanel.Api/Program.cs
@@ -100,8 +100,8 @@ var app = builder.Build();
 if (string.IsNullOrWhiteSpace(builder.Configuration["DataProtection:KeyRingPath"]))
 {
     app.Logger.LogWarning(
-        "DataProtection:KeyRingPath не задан — ключи шифрования секретов нод не персистентны " +
-        "и будут потеряны при пересоздании контейнера. В проде обязательно смонтируй том и укажи путь.");
+        "DataProtection:KeyRingPath is not set — node secret encryption keys are not persistent " +
+        "and will be lost when the container is recreated. Mount a volume and set the path in production.");
 }
 
 // Авто-применение миграций и идемпотентный сидинг (роли + админ из env) на старте.
diff --git a/backend/src/PnvPanel.Api/Telegram/PnvBotUpdateHandler.cs b/backend/src/PnvPanel.Api/Telegram/PnvBotUpdateHandler.cs
index 09ef446..270623b 100644
--- a/backend/src/PnvPanel.Api/Telegram/PnvBotUpdateHandler.cs
+++ b/backend/src/PnvPanel.Api/Telegram/PnvBotUpdateHandler.cs
@@ -36,13 +36,13 @@ public sealed class PnvBotUpdateHandler(
         }
         catch (Exception ex)
         {
-            logger.LogError(ex, "Ошибка обработки Telegram-апдейта {UpdateId}", update.Id);
+            logger.LogError(ex, "Failed to process Telegram update {UpdateId}", update.Id);
         }
     }
 
     public Task HandleErrorAsync(ITelegramBotClient botClient, Exception exception, HandleErrorSource source, CancellationToken cancellationToken)
     {
-        logger.LogError(exception, "Ошибка Telegram-бота (источник {Source})", source);
+        logger.LogError(exception, "Telegram bot error (source {Source})", source);
         return Task.CompletedTask;
     }
 
diff --git a/backend/src/PnvPanel.Api/Telegram/TelegramBotHostedService.cs b/backend/src/PnvPanel.Api/Telegram/TelegramBotHostedService.cs
index 18499b8..2c52479 100644
--- a/backend/src/PnvPanel.Api/Telegram/TelegramBotHostedService.cs
+++ b/backend/src/PnvPanel.Api/Telegram/TelegramBotHostedService.cs
@@ -21,7 +21,7 @@ public sealed class TelegramBotHostedService(
     {
         if (string.IsNullOrWhiteSpace(options.Value.BotToken))
         {
-            logger.LogWarning("Telegram__BotToken не задан — бот не стартует.");
+            logger.LogWarning("Telegram__BotToken is not set — bot will not start.");
             return;
         }
 
@@ -31,7 +31,7 @@ public sealed class TelegramBotHostedService(
             DropPendingUpdates = true,
         };
 
-        logger.LogInformation("Telegram-бот запускается (long polling)...");
+        logger.LogInformation("Telegram bot starting (long polling)...");
 
         try
         {
diff --git a/backend/src/PnvPanel.Application/Admin/Users/BlockUserCommandHandler.cs b/backend/src/PnvPanel.Application/Admin/Users/BlockUserCommandHandler.cs
index 33160f3..3a753bc 100644
--- a/backend/src/PnvPanel.Application/Admin/Users/BlockUserCommandHandler.cs
+++ b/backend/src/PnvPanel.Application/Admin/Users/BlockUserCommandHandler.cs
@@ -44,7 +44,7 @@ public sealed class BlockUserCommandHandler(
                     // с реальным состоянием клиента в 3x-ui (пользователь решит, что VPN погашен, а он жив).
                     // Конфиг останется Active и будет подхвачен повторным BlockUserCommand (идемпотентен).
                     logger.LogWarning(
-                        "Не удалось отключить клиента конфига {ConfigId} на ноде {NodeId} при блокировке пользователя {UserId}: {Error}",
+                        "Failed to disable client for config {ConfigId} on node {NodeId} while blocking user {UserId}: {Error}",
                         config.Id, node.Id, command.UserId, updateResult.Error);
                     continue;
                 }
diff --git a/backend/src/PnvPanel.Application/Admin/Users/UnblockUserCommandHandler.cs b/backend/src/PnvPanel.Application/Admin/Users/UnblockUserCommandHandler.cs
index 19ec59a..987eeeb 100644
--- a/backend/src/PnvPanel.Application/Admin/Users/UnblockUserCommandHandler.cs
+++ b/backend/src/PnvPanel.Application/Admin/Users/UnblockUserCommandHandler.cs
@@ -43,7 +43,7 @@ public sealed class UnblockUserCommandHandler(
                     // с реальным состоянием клиента в 3x-ui. Конфиг останется Disabled и будет подхвачен
                     // повторным UnblockUserCommand (идемпотентен).
                     logger.LogWarning(
-                        "Не удалось включить клиента конфига {ConfigId} на ноде {NodeId} при разблокировке пользователя {UserId}: {Error}",
+                        "Failed to enable client for config {ConfigId} on node {NodeId} while unblocking user {UserId}: {Error}",
                         config.Id, node.Id, command.UserId, updateResult.Error);
                     continue;
                 }
diff --git a/backend/src/PnvPanel.Application/Common/Behaviors/LoggingBehavior.cs b/backend/src/PnvPanel.Application/Common/Behaviors/LoggingBehavior.cs
index 7cb8660..344662f 100644
--- a/backend/src/PnvPanel.Application/Common/Behaviors/LoggingBehavior.cs
+++ b/backend/src/PnvPanel.Application/Common/Behaviors/LoggingBehavior.cs
@@ -10,11 +10,11 @@ public sealed class LoggingBehavior<TRequest, TResponse>(ILogger<LoggingBehavior
     public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
     {
         var requestName = typeof(TRequest).Name;
-        logger.LogInformation("Обработка {RequestName}", requestName);
+        logger.LogInformation("Handling {RequestName}", requestName);
 
         var response = await next();
 
-        logger.LogInformation("Обработан {RequestName}", requestName);
+        logger.LogInformation("Handled {RequestName}", requestName);
         return response;
     }
 }
diff --git a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/NodeHealthCheckService.cs b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/NodeHealthCheckService.cs
index a91087a..af10d14 100644
--- a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/NodeHealthCheckService.cs
+++ b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/NodeHealthCheckService.cs
@@ -23,7 +23,7 @@ public sealed class NodeHealthCheckService(IServiceScopeFactory scopeFactory, IL
             }
             catch (Exception ex)
             {
-                logger.LogError(ex, "Ошибка health-check нод");
+                logger.LogError(ex, "Node health-check failed");
             }
         }
         while (await timer.WaitForNextTickAsync(stoppingToken));
diff --git a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficRetentionService.cs b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficRetentionService.cs
index 7707cc1..19428df 100644
--- a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficRetentionService.cs
+++ b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficRetentionService.cs
@@ -25,7 +25,7 @@ public sealed class TrafficRetentionService(
             }
             catch (Exception ex)
             {
-                logger.LogError(ex, "Ошибка ретеншна истории трафика");
+                logger.LogError(ex, "Traffic history retention failed");
             }
         }
         while (await timer.WaitForNextTickAsync(stoppingToken));
@@ -40,6 +40,6 @@ public sealed class TrafficRetentionService(
         var deleted = await dbContext.TrafficSamples.Where(s => s.Timestamp < cutoff).ExecuteDeleteAsync(cancellationToken);
 
         if (deleted > 0)
-            logger.LogInformation("Удалено {Count} устаревших записей истории трафика", deleted);
+            logger.LogInformation("Deleted {Count} expired traffic history records", deleted);
     }
 }
diff --git a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficSyncService.cs b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficSyncService.cs
index 1de9581..0784d34 100644
--- a/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficSyncService.cs
+++ b/backend/src/PnvPanel.Infrastructure/BackgroundJobs/TrafficSyncService.cs
@@ -28,7 +28,7 @@ public sealed class TrafficSyncService(IServiceScopeFactory scopeFactory, ILogge
             }
             catch (Exception ex)
             {
-                logger.LogError(ex, "Ошибка синхронизации трафика");
+                logger.LogError(ex, "Traffic sync failed");
             }
         }
         while (await timer.WaitForNextTickAsync(stoppingToken));
diff --git a/backend/src/PnvPanel.Infrastructure/Identity/DbInitializer.cs b/backend/src/PnvPanel.Infrastructure/Identity/DbInitializer.cs
index 1ca3e38..970158d 100644
--- a/backend/src/PnvPanel.Infrastructure/Identity/DbInitializer.cs
+++ b/backend/src/PnvPanel.Infrastructure/Identity/DbInitializer.cs
@@ -38,10 +38,10 @@ public sealed class DbInitializer(
         if (!result.Succeeded)
         {
             throw new InvalidOperationException(
-                $"Не удалось создать роль '{name}': {string.Join(", ", result.Errors.Select(e => e.Description))}");
+                $"Failed to create role '{name}': {string.Join(", ", result.Errors.Select(e => e.Description))}");
         }
 
-        logger.LogInformation("Создана системная роль {RoleName}", name);
+        logger.LogInformation("Created system role {RoleName}", name);
     }
 
     private async Task SeedAdminAsync()
@@ -49,7 +49,7 @@ public sealed class DbInitializer(
         var options = adminSeedOptions.Value;
         if (string.IsNullOrWhiteSpace(options.Username) || string.IsNullOrWhiteSpace(options.Password))
         {
-            logger.LogWarning("AdminSeed__Username/AdminSeed__Password не заданы — учётка администратора не создана");
+            logger.LogWarning("AdminSeed__Username/AdminSeed__Password not set — admin account not created");
             return;
         }
 
@@ -68,11 +68,11 @@ public sealed class DbInitializer(
         if (!createResult.Succeeded)
         {
             throw new InvalidOperationException(
-                $"Не удалось создать администратора: {string.Join(", ", createResult.Errors.Select(e => e.Description))}");
+                $"Failed to create admin account: {string.Join(", ", createResult.Errors.Select(e => e.Description))}");
         }
 
         await userManager.AddToRoleAsync(admin, RoleNames.Admin);
-        logger.LogInformation("Создана учётка администратора {Username}", options.Username);
+        logger.LogInformation("Created admin account {Username}", options.Username);
     }
 
     private async Task SeedClientAppsAsync(CancellationToken cancellationToken)
@@ -83,7 +83,7 @@ public sealed class DbInitializer(
         var path = Path.Combine(AppContext.BaseDirectory, "seed", "client-apps.json");
         if (!File.Exists(path))
         {
-            logger.LogWarning("Файл сида каталога приложений не найден: {Path}", path);
+            logger.LogWarning("Client app catalog seed file not found: {Path}", path);
             return;
         }
 
@@ -94,7 +94,7 @@ public sealed class DbInitializer(
         {
             if (!Enum.TryParse<OsPlatform>(entry.OperatingSystem, ignoreCase: true, out var os))
             {
-                logger.LogWarning("Неизвестная ОС '{Os}' в сиде каталога приложений — пропущено", entry.OperatingSystem);
+                logger.LogWarning("Unknown OS '{Os}' in client app catalog seed — skipped", entry.OperatingSystem);
                 continue;
             }
 
@@ -104,7 +104,7 @@ public sealed class DbInitializer(
         }
 
         await dbContext.SaveChangesAsync(cancellationToken);
-        logger.LogInformation("Засеян каталог приложений: {Count} записей", entries.Count);
+        logger.LogInformation("Seeded client app catalog: {Count} entries", entries.Count);
     }
 
     private sealed record ClientAppSeedEntry(