Americanized some spellings.

django/contrib/postgres/aggregates/general.py

@@ -73,7 +73,7 @@ class StringAgg(_DeprecatedOrdering, _StringAgg):
             warnings.warn(
                 "delimiter: str will be resolved as a field reference instead "
                 "of a string literal on Django 7.0. Pass "
-                f"`delimiter=Value({delimiter!r})` to preserve the previous behaviour.",
+                f"`delimiter=Value({delimiter!r})` to preserve the previous behavior.",
                 category=RemovedInDjango70Warning,
                 stacklevel=2,
             )

django/db/migrations/migration.py

@@ -128,7 +128,7 @@ class Migration:
                         self.app_label, schema_editor, old_state, project_state
                     )
             else:
-                # Normal behaviour
+                # Normal behavior
                 operation.database_forwards(
                     self.app_label, schema_editor, old_state, project_state
                 )
@@ -189,7 +189,7 @@ class Migration:
                         self.app_label, schema_editor, from_state, to_state
                     )
             else:
-                # Normal behaviour
+                # Normal behavior
                 operation.database_backwards(
                     self.app_label, schema_editor, from_state, to_state
                 )

docs/man/django-admin.1

@@ -1379,7 +1379,7 @@ precedence. For a \fB\-\-verbosity\fP of 2 or higher, the automatically imported
 objects will be listed. To disable automatic importing entirely, use the
 \fB\-\-no\-imports\fP flag.
 .sp
-See the guide on \fI\%customizing this behaviour\fP to add or remove automatic imports.
+See the guide on \fI\%customizing this behavior\fP to add or remove automatic imports.
 .sp
 Automatic models import was added.
 

docs/ref/django-admin.txt

@@ -1071,7 +1071,7 @@ precedence. For a ``--verbosity`` of 2 or higher, the automatically imported
 objects will be listed. To disable automatic importing entirely, use the
 ``--no-imports`` flag.
 
-See the guide on :ref:`customizing this behaviour
+See the guide on :ref:`customizing this behavior
 <customizing-shell-auto-imports>` to add or remove automatic imports.
 
 .. versionchanged:: 5.2

tests/admin_views/tests.py

@@ -1940,9 +1940,9 @@ class AdminViewFormUrlTest(TestCase):
             reverse("admin:admin_views_restaurant_add", current_app=self.current_app),
             {"name": "test_value"},
         )
-        # this would be the usual behaviour
+        # this would be the usual behavior
         self.assertNotContains(response, 'value="test_value"')
-        # this is the overridden behaviour
+        # this is the overridden behavior
         self.assertContains(response, 'value="overridden_value"')
 
 
@@ -8806,7 +8806,7 @@ class GetFormsetsWithInlinesArgumentTest(TestCase):
 @override_settings(ROOT_URLCONF="admin_views.urls")
 class AdminSiteFinalCatchAllPatternTests(TestCase):
     """
-    Verifies the behaviour of the admin catch-all view.
+    Verifies the behavior of the admin catch-all view.
 
     * Anonynous/non-staff users are redirected to login for all URLs, whether
       otherwise valid or not.

tests/custom_lookups/tests.py

@@ -631,7 +631,7 @@ class LookupTransformCallOrderTests(SimpleTestCase):
             self.assertEqual(TrackCallsYearTransform.call_order, ["lookup"])
 
 
-class CustomisedMethodsTests(SimpleTestCase):
+class CustomizedMethodsTests(SimpleTestCase):
     def test_overridden_get_lookup(self):
         q = CustomModel.objects.filter(field__lookupfunc_monkeys=3)
         self.assertIn("monkeys()", str(q.query))

tests/foreign_object/tests.py

@@ -731,7 +731,7 @@ class TestCachedPathInfo(TestCase):
 
         ForeignObjectRel implements __getstate__(), so copy and pickle modules
         both use that, but ForeignObject implements __reduce__() and __copy__()
-        separately, so doesn't share the same behaviour.
+        separately, so doesn't share the same behavior.
         """
         foreign_object_rel = Membership._meta.get_field("person").remote_field
         # Trigger storage of cached_property into ForeignObjectRel's __dict__.

tests/model_forms/models.py

@@ -374,7 +374,7 @@ class FlexibleDatePost(models.Model):
     posted = models.DateField(blank=True, null=True)
 
 
-class Colour(models.Model):
+class Color(models.Model):
     name = models.CharField(max_length=50)
 
     def __iter__(self):
@@ -384,9 +384,9 @@ class Colour(models.Model):
         return self.name
 
 
-class ColourfulItem(models.Model):
+class ColorfulItem(models.Model):
     name = models.CharField(max_length=50)
-    colours = models.ManyToManyField(Colour)
+    colors = models.ManyToManyField(Color)
 
 
 class CustomErrorMessage(models.Model):

tests/model_forms/tests.py

@@ -38,8 +38,8 @@ from .models import (
     Book,
     Category,
     Character,
-    Colour,
+    Color,
-    ColourfulItem,
+    ColorfulItem,
     ConstraintsModel,
     CustomErrorMessage,
     CustomFF,
@@ -2998,18 +2998,18 @@ class OtherModelFormTests(TestCase):
         """
         ModelChoiceField should respect a prefetch_related() on its queryset.
         """
-        blue = Colour.objects.create(name="blue")
+        blue = Color.objects.create(name="blue")
-        red = Colour.objects.create(name="red")
+        red = Color.objects.create(name="red")
-        multicolor_item = ColourfulItem.objects.create()
+        multicolor_item = ColorfulItem.objects.create()
-        multicolor_item.colours.add(blue, red)
+        multicolor_item.colors.add(blue, red)
-        red_item = ColourfulItem.objects.create()
+        red_item = ColorfulItem.objects.create()
-        red_item.colours.add(red)
+        red_item.colors.add(red)
 
         class ColorModelChoiceField(forms.ModelChoiceField):
             def label_from_instance(self, obj):
-                return ", ".join(c.name for c in obj.colours.all())
+                return ", ".join(c.name for c in obj.colors.all())
 
-        field = ColorModelChoiceField(ColourfulItem.objects.prefetch_related("colours"))
+        field = ColorModelChoiceField(ColorfulItem.objects.prefetch_related("colors"))
         # CPython < 3.14 calls ModelChoiceField.__len__() when coercing to
         # tuple. PyPy and Python 3.14+ don't call __len__() and so .count()
         # isn't called on the QuerySet. The following would trigger an extra
@@ -3091,13 +3091,13 @@ class OtherModelFormTests(TestCase):
         )
 
     def test_iterable_model_m2m(self):
-        class ColourfulItemForm(forms.ModelForm):
+        class ColorfulItemForm(forms.ModelForm):
             class Meta:
-                model = ColourfulItem
+                model = ColorfulItem
                 fields = "__all__"
 
-        colour = Colour.objects.create(name="Blue")
+        color = Color.objects.create(name="Blue")
-        form = ColourfulItemForm()
+        form = ColorfulItemForm()
         self.maxDiff = 1024
         self.assertHTMLEqual(
             form.as_p(),
@@ -3105,12 +3105,12 @@ class OtherModelFormTests(TestCase):
             <p>
             <label for="id_name">Name:</label>
             <input id="id_name" type="text" name="name" maxlength="50" required></p>
-            <p><label for="id_colours">Colours:</label>
+            <p><label for="id_colors">Colors:</label>
-            <select multiple name="colours" id="id_colours" required>
+            <select multiple name="colors" id="id_colors" required>
             <option value="%(blue_pk)s">Blue</option>
             </select></p>
             """
-            % {"blue_pk": colour.pk},
+            % {"blue_pk": color.pk},
         )
 
     def test_callable_field_default(self):
@@ -3709,13 +3709,13 @@ class StrictAssignmentTests(SimpleTestCase):
 class ModelToDictTests(TestCase):
     def test_many_to_many(self):
         """Data for a ManyToManyField is a list rather than a lazy QuerySet."""
-        blue = Colour.objects.create(name="blue")
+        blue = Color.objects.create(name="blue")
-        red = Colour.objects.create(name="red")
+        red = Color.objects.create(name="red")
-        item = ColourfulItem.objects.create()
+        item = ColorfulItem.objects.create()
-        item.colours.set([blue])
+        item.colors.set([blue])
-        data = model_to_dict(item)["colours"]
+        data = model_to_dict(item)["colors"]
         self.assertEqual(data, [blue])
-        item.colours.set([red])
+        item.colors.set([red])
         # If data were a QuerySet, it would be reevaluated here and give "red"
         # instead of the original value.
         self.assertEqual(data, [blue])

tests/postgres_tests/test_aggregates.py

@@ -658,7 +658,7 @@ class TestGeneralAggregate(PostgreSQLTestCase):
         msg = (
             "delimiter: str will be resolved as a field reference instead "
             'of a string literal on Django 7.0. Pass `delimiter=Value("\'")` to '
-            "preserve the previous behaviour."
+            "preserve the previous behavior."
         )
 
         with self.assertWarnsMessage(RemovedInDjango70Warning, msg) as ctx:

tests/sitemaps_tests/templates/custom_sitemap.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- This is a customised template -->
+<!-- This is a customized template -->
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 {% spaceless %}
 {% for url in urlset %}

tests/sitemaps_tests/templates/custom_sitemap_lastmod_index.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- This is a customised template -->
+<!-- This is a customized template -->
 <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 {% spaceless %}
 {% for site in sitemaps %}

tests/sitemaps_tests/test_http.py

@@ -68,7 +68,7 @@ class HTTPSitemapTests(SitemapTestsBase):
         "A simple sitemap index can be rendered with a custom template"
         response = self.client.get("/simple/custom-lastmod-index.xml")
         expected_content = """<?xml version="1.0" encoding="UTF-8"?>
-<!-- This is a customised template -->
+<!-- This is a customized template -->
 <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 <sitemap><loc>%s/simple/sitemap-simple.xml</loc><lastmod>%s</lastmod></sitemap>
 </sitemapindex>
@@ -140,7 +140,7 @@ class HTTPSitemapTests(SitemapTestsBase):
         "A simple sitemap can be rendered with a custom template"
         response = self.client.get("/simple/custom-sitemap.xml")
         expected_content = """<?xml version="1.0" encoding="UTF-8"?>
-<!-- This is a customised template -->
+<!-- This is a customized template -->
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
 <url><loc>%s/location/</loc><lastmod>%s</lastmod><changefreq>never</changefreq><priority>0.5</priority></url>
 </urlset>