diff --git a/apps/workspaces/api/views.py b/apps/workspaces/api/views.py
index 8a7a557..24ec4f9 100644
--- a/apps/workspaces/api/views.py
+++ b/apps/workspaces/api/views.py
@@ -290,7 +290,7 @@ class WorkspaceMembershipViewSet(ModelViewSet):
                         "status": "invalid",
                         "action": "none",
                         "user": None,
-                        "messages": [f"Import is limited to {MEMBER_IMPORT_MAX_ROWS} rows."],
+                        "messages": ["too_many_rows"],
                     }
                 ],
             }
@@ -307,40 +307,40 @@ class WorkspaceMembershipViewSet(ModelViewSet):
             normalized_rate = ""
 
             if not mobile:
-                messages.append("Mobile is required.")
+                messages.append("mobile_required")
             elif mobile in seen_mobiles:
-                messages.append("This mobile appears more than once in the import file.")
+                messages.append("duplicate_mobile")
             else:
                 seen_mobiles.add(mobile)
                 user = User.objects.filter(mobile=mobile).first()
                 if not user:
-                    messages.append("No user exists with this mobile number.")
+                    messages.append("user_not_found")
                 elif str(user.id) in existing_memberships:
-                    messages.append("This user is already a member of the workspace.")
+                    messages.append("already_member")
 
             if role == WorkspaceMembership.Role.OWNER:
-                messages.append("Owner role cannot be imported.")
+                messages.append("owner_role_not_allowed")
             elif role not in allowed_roles:
-                messages.append("Role must be admin, member, or guest.")
+                messages.append("invalid_role")
             elif not can_assign_workspace_role(request.user, workspace, role):
-                messages.append("You do not have permission to assign this role.")
+                messages.append("role_permission_denied")
 
             has_rate = bool(hourly_rate_raw)
             has_currency = bool(currency)
             if has_rate != has_currency:
-                messages.append("Hourly rate and currency must be provided together.")
+                messages.append("rate_currency_pair_required")
             elif has_rate and has_currency:
                 try:
                     parsed_rate = Decimal(hourly_rate_raw.replace(",", ""))
                     if parsed_rate <= Decimal("0"):
-                        messages.append("Hourly rate must be greater than zero.")
+                        messages.append("hourly_rate_positive")
                     else:
                         normalized_rate = f"{parsed_rate:.2f}"
                 except (InvalidOperation, ValueError):
-                    messages.append("Hourly rate must be a valid number.")
+                    messages.append("hourly_rate_invalid")
 
                 if not PriceUnit.objects.filter(code=currency, is_deleted=False).exists():
-                    messages.append("Currency is invalid.")
+                    messages.append("currency_invalid")
 
             row_status = "invalid" if messages else "valid"
             if messages:
diff --git a/apps/workspaces/tests/test_capabilities.py b/apps/workspaces/tests/test_capabilities.py
index 9bb1e76..1d393ac 100644
--- a/apps/workspaces/tests/test_capabilities.py
+++ b/apps/workspaces/tests/test_capabilities.py
@@ -407,7 +407,7 @@ class WorkspaceCapabilityTests(APITestCase):
 
         self.assertEqual(response.status_code, 200)
         self.assertFalse(response.data["can_commit"])
-        self.assertIn("permission", response.data["rows"][0]["messages"][0].lower())
+        self.assertIn("role_permission_denied", response.data["rows"][0]["messages"])
 
     def test_member_cannot_import_workspace_members(self):
         target = self._user(24)