diff --git a/package.json b/package.json
index d879c0a..ccf9f3b 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
     "test": "vitest",
     "test:watch": "vitest --watch",
     "redis:up": "docker compose up -d redis",
-    "redis:down": "docker compose stop redis"
+    "redis:down": "docker compose stop redis",
+    "validate-locales": "node scripts/validate-locales.js"
   },
   "dependencies": {
     "@octokit/graphql": "^9.0.3",
diff --git a/scripts/validate-locales.js b/scripts/validate-locales.js
new file mode 100644
index 0000000..e34f91a
--- /dev/null
+++ b/scripts/validate-locales.js
@@ -0,0 +1,22 @@
+/* eslint-disable @typescript-eslint/no-require-imports */
+const fs = require('fs');
+const path = require('path');
+
+const localesDir = path.join(__dirname, '..', 'locales');
+const enKeys = Object.keys(JSON.parse(fs.readFileSync(path.join(localesDir, 'en.json'), 'utf8'))).sort();
+
+let hasError = false;
+
+fs.readdirSync(localesDir).forEach(file => {
+  if (file === 'en.json') return;
+
+  const fileKeys = Object.keys(JSON.parse(fs.readFileSync(path.join(localesDir, file), 'utf8'))).sort();
+  const missing = enKeys.filter(k => !fileKeys.includes(k));
+  const extra = fileKeys.filter(k => !enKeys.includes(k));
+  if (missing.length || extra.length) {
+    hasError = true;
+    console.error(`${file}: ${missing.length ? `Missing keys: ${missing.join(', ')}` : ''}${extra.length ? ` Extra keys: ${extra.join(', ')}` : ''}`);
+  }
+});
+
+process.exit(hasError ? 1 : 0);