diff --git a/specifyweb/specify/tests/test_schema_localization_contract.py b/specifyweb/specify/tests/test_schema_localization_contract.py
new file mode 100644
index 00000000000..095900682f6
--- /dev/null
+++ b/specifyweb/specify/tests/test_schema_localization_contract.py
@@ -0,0 +1,80 @@
+import ast
+import json
+from pathlib import Path
+from unittest import TestCase
+
+
+class SchemaLocalizationContractTests(TestCase):
+    """Ensure schema localization entries cover the model-backed tables."""
+
+    @classmethod
+    def setUpClass(cls):
+        cls.repo_root = Path(__file__).resolve().parents[3]
+        cls.localization_path = cls.repo_root / 'config' / 'common' / 'schema_localization_en.json'
+        cls.models_path = cls.repo_root / 'specifyweb' / 'specify' / 'models.py'
+
+        with cls.localization_path.open(encoding='utf-8') as handle:
+            cls.localization = json.load(handle)
+
+        cls.model_tables = cls._extract_model_tables()
+
+    @classmethod
+    def _extract_model_tables(cls):
+        source = cls.models_path.read_text(encoding='utf-8')
+        module = ast.parse(source)
+        tables = {}
+
+        for node in module.body:
+            if not isinstance(node, ast.ClassDef):
+                continue
+
+            for child in node.body:
+                if isinstance(child, ast.ClassDef) and child.name == 'Meta':
+                    for stmt in child.body:
+                        if isinstance(stmt, ast.Assign):
+                            for target in stmt.targets:
+                                if isinstance(target, ast.Name) and target.id == 'db_table':
+                                    if isinstance(stmt.value, ast.Constant) and isinstance(stmt.value.value, str):
+                                        table = stmt.value.value.lower()
+                                        tables.setdefault(table, set()).add(node.name)
+                    break
+
+        return tables
+
+    def test_model_tables_have_schema_localization_entries(self):
+        json_keys = set(self.localization.keys())
+        model_tables = set(self.model_tables)
+
+        missing = sorted(model_tables - json_keys)
+        extra = sorted(json_keys - model_tables)
+
+        allowlisted_json_only_tables = {
+            'dnasequencingrunattachment',
+            'libraryrole',
+            'libraryrolepolicy',
+            'message',
+            'role',
+            'rolepolicy',
+            'spattachmentdataset',
+            'spdataset',
+            'spdatasetattachment',
+            'spmerging',
+            'spuserexternalid',
+            'uniquenessrule',
+            'uniquenessrulefield',
+            'userpolicy',
+            'userrole',
+        }
+
+        unexpected_extra = [table for table in extra if table not in allowlisted_json_only_tables]
+
+        if missing or unexpected_extra:
+            self.fail(
+                'Missing schema localization entries for model-backed tables:\n'
+                + '\n'.join(
+                    f'{table}: {", ".join(sorted(self.model_tables[table]))}'
+                    for table in missing
+                )
+                + '\n\nUnexpected schema localization-only tables:\n'
+                + '\n'.join(unexpected_extra)
+            )