diff --git a/Controllers/ProductController.cs b/Controllers/ProductController.cs
index 2567b2c..1e0814e 100644
--- a/Controllers/ProductController.cs
+++ b/Controllers/ProductController.cs
@@ -41,11 +41,11 @@ namespace FirmTracker_Server.Controllers
         {
             if (product.Type != 0 && product.Type != 1)
             {
-                return BadRequest("Product type must be set to 0 or 1");
+                return BadRequest("Kategoria produktu musi być ustawiona na 0 lub 1.");
             }
             if (product.Type == 0 && product.Availability != 0)
             {
-                return BadRequest("Services availability must be set to 0");
+                return BadRequest("Dostępność usługi musi być ustawiona na 0.");
             }
             try
             {
@@ -88,14 +88,14 @@ namespace FirmTracker_Server.Controllers
         public IActionResult UpdateProduct(int id, [FromBody] Product product)
         {
             if (id != product.Id)
-                return BadRequest("Product ID mismatch");
+                return BadRequest("ID produktu nie zgadza się.");
             if (product.Type != 0 && product.Type != 1)
             {
-                return BadRequest("Product type must be set to 0 or 1");
+                return BadRequest("Kategoria produktu musi być ustawiona na 0 lub 1.");
             }
             if (product.Type == 0 && product.Availability != 0)
             {
-                return BadRequest("Services availability must be set to 0");
+                return BadRequest("Dostępność usługi musi być ustawiona na 0.");
             }
 
             try
@@ -149,7 +149,7 @@ namespace FirmTracker_Server.Controllers
                 var product = _productCrud.GetProduct(order.ProductId);
                 if (product == null)
                 {
-                    return BadRequest($"Product with ID {order.ProductId} not found.");
+                    return BadRequest($"Nie znaleziono produktu o ID {order.ProductId}.");
                 }
                 totalPrice += product.Price * order.Quantity;
             }
diff --git a/Controllers/ReportController.cs b/Controllers/ReportController.cs
index 807356b..fe917bb 100644
--- a/Controllers/ReportController.cs
+++ b/Controllers/ReportController.cs
@@ -51,7 +51,7 @@ namespace FirmTracker_Server.Controllers
                 var toDate = dateRange.ToDate;
                 if (fromDate >= toDate)
                 {
-                    return BadRequest();
+                    return BadRequest("Nieprawidłowy zakres dat.");
                 }
                 using (var session = SessionFactory.OpenSession())
                 {
@@ -191,7 +191,7 @@ namespace FirmTracker_Server.Controllers
                     var toDate = dateRange.ToDate;
                     if (fromDate >= toDate)
                     {
-                        return BadRequest();
+                        return BadRequest("Nieprawidłowy zakres dat.");
                     }
                     var transactions = session.Query<nHibernate.Transactions.Transaction>()
                 .Where(t => t.Date >= fromDate && t.Date <= toDate)
diff --git a/Controllers/TransactionController.cs b/Controllers/TransactionController.cs
index d142ba1..3f82653 100644
--- a/Controllers/TransactionController.cs
+++ b/Controllers/TransactionController.cs
@@ -58,7 +58,7 @@ namespace FirmTracker_Server.Controllers
                     var productByName = _productCRUD.GetProductByName(product.ProductName);
                     if (productByName == null)
                     {
-                        throw new InvalidOperationException($"Product with name {product.ProductName} does not exist.");
+                        throw new InvalidOperationException($"Produkt o nazwie {product.ProductName} nie istnieje.");
                     }
                     product.ProductID = productByName.Id;
                     product.TransactionId = transaction.Id;
@@ -71,7 +71,7 @@ namespace FirmTracker_Server.Controllers
 
                         if (product.Quantity > prod.Availability)
                         {
-                            throw new InvalidOperationException($"Can't add product {prod.Name} to transaction. Available: {prod.Availability}, Desired: {product.Quantity}");
+                            throw new InvalidOperationException($"Nie można dodać {prod.Name} do transakcji. Dostępność: {prod.Availability}, Zażądano: {product.Quantity}");
                             //return BadRequest($"Can't add product {product.ProductID} to transaction. Available: {availability}, Desired: {product.Quantity}");
                         }
                     }
@@ -121,7 +121,7 @@ namespace FirmTracker_Server.Controllers
         public IActionResult UpdateTransaction(int id, [FromBody] nHibernate.Transactions.Transaction transaction)
         {
             if (id != transaction.Id)
-                return BadRequest("Transaction ID mismatch");
+                return BadRequest("ID transakcji nie zgadza się.");
 
             try
             {
@@ -130,7 +130,7 @@ namespace FirmTracker_Server.Controllers
                     var productByName = _productCRUD.GetProductByName(product.ProductName);
                     if (productByName == null)
                     {
-                        throw new InvalidOperationException($"Product with name {product.ProductName} does not exist.");
+                        throw new InvalidOperationException($"Produkt o nazwie {product.ProductName} nie istnieje.");
                     }
                     product.ProductID = productByName.Id;
                     product.TransactionId = transaction.Id;
diff --git a/nHibernate/Transactions/TransactionCRUD.cs b/nHibernate/Transactions/TransactionCRUD.cs
index c069e4c..57a0221 100644
--- a/nHibernate/Transactions/TransactionCRUD.cs
+++ b/nHibernate/Transactions/TransactionCRUD.cs
@@ -91,7 +91,6 @@ namespace FirmTracker_Server.nHibernate.Transactions
                     foreach (var tp in oldTransaction.TransactionProducts)
                     {
                         var product = session.Get<Product>(tp.ProductID);
-                        Console.WriteLine($"Product {product.Name} before quantity: {tp.Quantity}");
                         
                         if (product.Type != 0)
                         {
@@ -116,9 +115,6 @@ namespace FirmTracker_Server.nHibernate.Transactions
                             transaction.TotalPrice += (product.Price) * ((1 - (transaction.Discount / 100)));
                         }
 
-                        //var product = session.Load<Product>(transactionProduct.ProductID);
-                        Console.WriteLine($"Product {product.Name} after quantity: {transactionProduct.Quantity}");
-
                         transactionProduct.TransactionId = transaction.Id;
                         session.SaveOrUpdate(transactionProduct);
                     }
@@ -134,7 +130,7 @@ namespace FirmTracker_Server.nHibernate.Transactions
                         {
                             if (transactionProduct.Quantity > product.Availability)
                             {
-                                throw new InvalidOperationException($"Can't add product {product.Name} to transaction. Available: {product.Availability}, Desired: {transactionProduct.Quantity}");
+                                throw new InvalidOperationException($"Nie można dodać {product.Name} do transakcji. Dostępność: {product.Availability}, Zażądano: {transactionProduct.Quantity}");
                             }
                             else
                             {