diff --git a/tests/i18n/locale-keys.test.ts b/tests/i18n/locale-keys.test.ts
new file mode 100644
index 0000000..2d16679
--- /dev/null
+++ b/tests/i18n/locale-keys.test.ts
@@ -0,0 +1,18 @@
+import { describe, it, expect } from 'vitest';
+import { en } from '../../src/i18n/locales/en';
+import { es } from '../../src/i18n/locales/es';
+import { ko } from '../../src/i18n/locales/ko';
+
+describe('i18n locale key parity', () => {
+  it('es should have the same keys as en', () => {
+    const enKeys = Object.keys(en).sort();
+    const esKeys = Object.keys(es).sort();
+    expect(esKeys).toEqual(enKeys);
+  });
+
+  it('ko should have the same keys as en', () => {
+    const enKeys = Object.keys(en).sort();
+    const koKeys = Object.keys(ko).sort();
+    expect(koKeys).toEqual(enKeys);
+  });
+});