diff --git a/src/mono/wasm/Wasm.Build.Tests/Blazor/BuildPublishTests.cs b/src/mono/wasm/Wasm.Build.Tests/Blazor/BuildPublishTests.cs
index 01c286a7ec2f4..769050ce46667 100644
--- a/src/mono/wasm/Wasm.Build.Tests/Blazor/BuildPublishTests.cs
+++ b/src/mono/wasm/Wasm.Build.Tests/Blazor/BuildPublishTests.cs
@@ -198,7 +198,10 @@ public void BugRegression_60479_WithRazorClassLib()
                 .ExecuteWithCapturedOutput("new razorclasslib")
                 .EnsureSuccessful();
 
-        AddItemsPropertiesToProject(wasmProjectFile, extraItems:@"
+        AddItemsPropertiesToProject(wasmProjectFile, extraItems: UseWebcil ? @"
+            <ProjectReference Include=""..\RazorClassLibrary\RazorClassLibrary.csproj"" />
+            <BlazorWebAssemblyLazyLoad Include=""RazorClassLibrary.webcil"" />
+        " : @"
             <ProjectReference Include=""..\RazorClassLibrary\RazorClassLibrary.csproj"" />
             <BlazorWebAssemblyLazyLoad Include=""RazorClassLibrary.dll"" />
         ");
@@ -223,7 +226,7 @@ public void BugRegression_60479_WithRazorClassLib()
             throw new XunitException($"Could not find resources.lazyAssembly object in {bootJson}");
         }
 
-        Assert.Contains("RazorClassLibrary.dll", lazyVal.EnumerateObject().Select(jp => jp.Name));
+        Assert.Contains("RazorClassLibrary.webcil", lazyVal.EnumerateObject().Select(jp => jp.Name));
     }
 
     [ConditionalTheory(typeof(BuildTestBase), nameof(IsUsingWorkloads))]
diff --git a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ComputeWasmPublishAssets.cs b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ComputeWasmPublishAssets.cs
index 36145f4573d71..0eddaf4d4aed9 100644
--- a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ComputeWasmPublishAssets.cs
+++ b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ComputeWasmPublishAssets.cs
@@ -373,6 +373,9 @@ private List<ITaskItem> ComputeUpdatedAssemblies(
                 assetsToUpdate.Add(satelliteAssembly.ItemSpec, satelliteAssembly);
                 var culture = satelliteAssembly.GetMetadata("AssetTraitValue");
                 var fileName = Path.GetFileName(satelliteAssembly.GetMetadata("RelativePath"));
+                if (IsWebCilEnabled)
+                    fileName = Path.ChangeExtension(fileName, ".dll");
+
                 if (satelliteAssemblies.TryGetValue((culture, fileName), out var existing))
                 {
                     filesToRemove.Add(existing);
diff --git a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
index fc8136525bd68..17cc80053284d 100644
--- a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
+++ b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/ConvertDllsToWebCil.cs
@@ -62,7 +62,11 @@ public override bool Execute()
                 var webcilWriter = Microsoft.WebAssembly.Build.Tasks.WebcilConverter.FromPortableExecutable(inputPath: filePath, outputPath: tmpWebcil, logger: Log);
                 webcilWriter.ConvertToWebcil();
 
-                var finalWebcil = Path.Combine(OutputPath, Path.GetFileNameWithoutExtension(filePath) + ".webcil");
+                string candicatePath = Path.Combine(OutputPath, candidate.GetMetadata("Culture"));
+                if (!Directory.Exists(candicatePath))
+                    Directory.CreateDirectory(candicatePath);
+
+                var finalWebcil = Path.Combine(candicatePath, Path.GetFileNameWithoutExtension(filePath) + ".webcil");
                 if (Utils.CopyIfDifferent(tmpWebcil, finalWebcil, useHash: true))
                     Log.LogMessage(MessageImportance.Low, $"Generated {finalWebcil} .");
                 else
@@ -72,10 +76,16 @@ public override bool Execute()
 
                 var webcilItem = new TaskItem(finalWebcil, candidate.CloneCustomMetadata());
                 webcilItem.SetMetadata("RelativePath", Path.ChangeExtension(candidate.GetMetadata("RelativePath"), ".webcil"));
-                webcilItem.SetMetadata("AssetTraitName", "WasmResource");
-                webcilItem.SetMetadata("AssetTraitValue", "runtime");
                 webcilItem.SetMetadata("OriginalItemSpec", finalWebcil);
 
+                if (webcilItem.GetMetadata("AssetTraitName") == "Culture")
+                {
+                    string relatedAsset = webcilItem.GetMetadata("RelatedAsset");
+                    relatedAsset = Path.ChangeExtension(relatedAsset, ".webcil");
+                    webcilItem.SetMetadata("RelatedAsset", relatedAsset);
+                    Log.LogMessage(MessageImportance.Low, $"Changing related asset of {webcilItem} to {relatedAsset}.");
+                }
+
                 webCilCandidates.Add(webcilItem);
             }
             else
diff --git a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/GenerateWasmBootJson.cs b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/GenerateWasmBootJson.cs
index d8a5a3d2ae9e6..7cb776c236229 100644
--- a/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/GenerateWasmBootJson.cs
+++ b/src/tasks/Microsoft.NET.Sdk.WebAssembly.Pack.Tasks/GenerateWasmBootJson.cs
@@ -174,7 +174,7 @@ public void WriteBootJson(Stream output, string entryAssemblyName)
                 }
                 else if (string.Equals("symbol", assetTraitValue, StringComparison.OrdinalIgnoreCase))
                 {
-                    if (TryGetLazyLoadedAssembly($"{fileName}.dll", out _))
+                    if (TryGetLazyLoadedAssembly($"{fileName}.dll", out _) || TryGetLazyLoadedAssembly($"{fileName}.webcil", out _))
                     {
                         Log.LogMessage(MessageImportance.Low, "Candidate '{0}' is defined as a lazy loaded symbols file.", resource.ItemSpec);
                         resourceData.lazyAssembly ??= new ResourceHashesByNameDictionary();