diff --git a/zerver/lib/i18n.py b/zerver/lib/i18n.py
index 7aeba76dba..add39c2327 100644
--- a/zerver/lib/i18n.py
+++ b/zerver/lib/i18n.py
@@ -85,7 +85,7 @@ def get_browser_language_code(request: HttpRequest) -> Optional[str]:
     return None
 
 
-def get_default_language_for_new_user(request: HttpRequest, realm: Realm) -> str:
+def get_default_language_for_new_user(realm: Realm, *, request: HttpRequest) -> str:
     browser_language_code = get_browser_language_code(request)
     if browser_language_code is not None:
         return browser_language_code
diff --git a/zerver/tests/test_signup.py b/zerver/tests/test_signup.py
index 5af3b967c4..b508fbf40f 100644
--- a/zerver/tests/test_signup.py
+++ b/zerver/tests/test_signup.py
@@ -3984,17 +3984,17 @@ class UserSignUpTest(ZulipTestCase):
         realm = get_realm("zulip")
         req = HostRequestMock()
         req.META["HTTP_ACCEPT_LANGUAGE"] = "de,en"
-        self.assertEqual(get_default_language_for_new_user(req, realm), "de")
+        self.assertEqual(get_default_language_for_new_user(realm, request=req), "de")
 
         do_set_realm_property(realm, "default_language", "hi", acting_user=None)
         realm.refresh_from_db()
         req = HostRequestMock()
         req.META["HTTP_ACCEPT_LANGUAGE"] = "de,en"
-        self.assertEqual(get_default_language_for_new_user(req, realm), "de")
+        self.assertEqual(get_default_language_for_new_user(realm, request=req), "de")
 
         req = HostRequestMock()
         req.META["HTTP_ACCEPT_LANGUAGE"] = ""
-        self.assertEqual(get_default_language_for_new_user(req, realm), "hi")
+        self.assertEqual(get_default_language_for_new_user(realm, request=req), "hi")
 
 
 class DeactivateUserTest(ZulipTestCase):
diff --git a/zerver/views/registration.py b/zerver/views/registration.py
index 203731c2e5..e45f82df7f 100644
--- a/zerver/views/registration.py
+++ b/zerver/views/registration.py
@@ -566,7 +566,7 @@ def registration_helper(
             do_change_user_setting(
                 user_profile,
                 "default_language",
-                get_default_language_for_new_user(request, realm),
+                get_default_language_for_new_user(realm, request=request),
                 acting_user=None,
             )
             # TODO: When we clean up the `do_activate_mirror_dummy_user` code path,
@@ -583,7 +583,7 @@ def registration_helper(
                 role=role,
                 tos_version=settings.TERMS_OF_SERVICE_VERSION,
                 timezone=timezone,
-                default_language=get_default_language_for_new_user(request, realm),
+                default_language=get_default_language_for_new_user(realm, request=request),
                 default_stream_groups=default_stream_groups,
                 source_profile=source_profile,
                 realm_creation=realm_creation,