diff --git a/src/packagedcode/golang.py b/src/packagedcode/golang.py
index c45be7a5e3a..bbf7f23f3de 100644
--- a/src/packagedcode/golang.py
+++ b/src/packagedcode/golang.py
@@ -22,7 +22,7 @@
 # CHECK: https://forum.golangbridge.org/t/url-to-download-package/19811
 
 # TODO: use the LICENSE file convention!
-# TODO: support "vendor" and "workspace" layouts
+# TODO: support "vendor" layout
 
 
 class BaseGoModuleHandler(models.DatafileHandler):
@@ -108,7 +108,7 @@ class GoSumHandler(BaseGoModuleHandler):
     path_patterns = ('*/go.sum',)
     default_package_type = 'golang'
     default_primary_language = 'Go'
-    description = 'Go module cheksums file'
+    description = 'Go module checksums file'
     documentation_url = 'https://go.dev/ref/mod#go-sum-files'
 
     @classmethod
diff --git a/src/packagedcode/nuget.py b/src/packagedcode/nuget.py
index d0d7e110f2f..5fb10b869ae 100644
--- a/src/packagedcode/nuget.py
+++ b/src/packagedcode/nuget.py
@@ -94,6 +94,7 @@ class NugetNupkgHandler(models.NonAssemblableDatafileHandler):
     datasource_id = 'nuget_nupkg'
     path_patterns = ('*.nupkg',)
     default_package_type = 'nuget'
+    default_primary_language = 'C#'
     filetypes = ('zip archive', 'microsoft ooxml',)
     description = 'NuGet nupkg package archive'
     documentation_url = 'https://en.wikipedia.org/wiki/Open_Packaging_Conventions'
@@ -103,6 +104,7 @@ class NugetNuspecHandler(models.DatafileHandler):
     datasource_id = 'nuget_nupsec'
     path_patterns = ('*.nuspec',)
     default_package_type = 'nuget'
+    default_primary_language = 'C#'
     description = 'NuGet nuspec package manifest'
     documentation_url = 'https://docs.microsoft.com/en-us/nuget/reference/nuspec'
 
@@ -185,6 +187,7 @@ class NugetPackagesLockHandler(models.DatafileHandler):
     datasource_id = 'nuget_packages_lock'
     path_patterns = ('*packages.lock.json',)
     default_package_type = 'nuget'
+    default_primary_language = 'C#'
     description = 'NuGet packages.lock.json file'
     documentation_url = 'https://learn.microsoft.com/en-us/nuget/reference/cli-reference/cli-ref-restore'
 
diff --git a/tests/packagedcode/data/nuget/packages.lock.json.expected b/tests/packagedcode/data/nuget/packages.lock.json.expected
index 8b9cc48ce86..d0fe7f8fd3b 100644
--- a/tests/packagedcode/data/nuget/packages.lock.json.expected
+++ b/tests/packagedcode/data/nuget/packages.lock.json.expected
@@ -6,7 +6,7 @@
     "version": null,
     "qualifiers": {},
     "subpath": null,
-    "primary_language": null,
+    "primary_language": "C#",
     "description": null,
     "release_date": null,
     "parties": [],
@@ -54,7 +54,7 @@
           "version": "4.0.1",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -142,7 +142,7 @@
           "version": "6.0.1",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -428,7 +428,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -516,7 +516,7 @@
           "version": "4.0.1",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -582,7 +582,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -659,7 +659,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -725,7 +725,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -791,7 +791,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -868,7 +868,7 @@
           "version": "6.0.1",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -945,7 +945,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1055,7 +1055,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1165,7 +1165,7 @@
           "version": "6.0.1",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1264,7 +1264,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1341,7 +1341,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1395,7 +1395,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1461,7 +1461,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1549,7 +1549,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1603,7 +1603,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1691,7 +1691,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1801,7 +1801,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1855,7 +1855,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -1998,7 +1998,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2119,7 +2119,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2207,7 +2207,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2317,7 +2317,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2449,7 +2449,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2526,7 +2526,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2636,7 +2636,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2702,7 +2702,7 @@
           "version": "5.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2756,7 +2756,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2822,7 +2822,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2876,7 +2876,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2930,7 +2930,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],
@@ -2996,7 +2996,7 @@
           "version": "6.0.0",
           "qualifiers": {},
           "subpath": null,
-          "primary_language": null,
+          "primary_language": "C#",
           "description": null,
           "release_date": null,
           "parties": [],