diff --git a/netbox/utilities/error_handlers.py b/netbox/utilities/error_handlers.py
index 386ec6f39..e1e016e71 100644
--- a/netbox/utilities/error_handlers.py
+++ b/netbox/utilities/error_handlers.py
@@ -7,7 +7,7 @@ from django.db.models import ProtectedError, RestrictedError
 from django.http import JsonResponse
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext_lazy as _, ngettext
 from rest_framework import status
 
 __all__ = (
@@ -28,7 +28,10 @@ def handle_protectederror(obj_list, request, e):
         raise e
 
     # Formulate the error message
-    err_message = _("Unable to delete <strong>{objects}</strong>. {count} dependent objects were found: ").format(
+    err_message = _(ngettext(
+        "Unable to delete <strong>{objects}</strong>. {count} dependent object was found: ",
+        "Unable to delete <strong>{objects}</strong>. {count} dependent objects were found: ",
+        len(protected_objects),)).format(
         objects=', '.join(str(obj) for obj in obj_list),
         count=len(protected_objects) if len(protected_objects) <= 50 else _('More than 50')
     )
diff --git a/netbox/virtualization/models/clusters.py b/netbox/virtualization/models/clusters.py
index f8acc4c36..127d35973 100644
--- a/netbox/virtualization/models/clusters.py
+++ b/netbox/virtualization/models/clusters.py
@@ -2,7 +2,7 @@ from django.contrib.contenttypes.fields import GenericRelation
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.urls import reverse
-from django.utils.translation import gettext_lazy as _
+from django.utils.translation import gettext_lazy as _, ngettext
 
 from dcim.models import Device
 from netbox.models import OrganizationalModel, PrimaryModel
@@ -137,7 +137,9 @@ class Cluster(ContactsMixin, PrimaryModel):
         if self.pk and self.site:
             if nonsite_devices := Device.objects.filter(cluster=self).exclude(site=self.site).count():
                 raise ValidationError({
-                    'site': _(
-                        "{count} devices are assigned as hosts for this cluster but are not in site {site}"
-                    ).format(count=nonsite_devices, site=self.site)
+                    'site': _(ngettext(
+                        "{count} device is assigned as hosts for this cluster but is not in site {site}",
+                        "{count} devices are assigned as hosts for this cluster but are not in site {site}",
+                        nonsite_devices,
+                    )).format(count=nonsite_devices, site=self.site)
                 })