community/error-localization-engine/package.json (1)

6-9: Declare a minimum Node version for node --watch.

The dev script depends on node --watch, which isn’t available in older Node LTS. Consider adding an engines.node constraint (or a fallback dev script) to prevent confusing runtime errors.

♻️ Suggested adjustment

   "scripts": {
     "start": "node server.js",
     "dev": "node --watch server.js"
   },
+  "engines": {
+    "node": ">=18.11"
+  },
   "dependencies": {

community/error-localization-engine/server.js (1)

29-34: Move dynamic require to module level.

The require('./lingoClient') inside the route handler is evaluated on every request. Move it to the top with other imports for efficiency.

Suggested fix

 const localizer = require('./middleware/localizer');
 const authRoutes = require('./routes/auth');
+const { localizeError } = require('./lingoClient');
 
 const app = express();

Then update the route:

 // Root endpoint
 app.get('/', async (req, res) => {
-    const { localizeError } = require('./lingoClient');
     const msg = await localizeError("Welcome to the Error Localization Engine Demo API!", req.targetLang);
     res.send(msg);
 });

community/error-localization-engine/public/app.js (1)

17-24: Consider encoding the language parameter.

While the current language values (en, es, fr, de, hi, ja) are safe, using encodeURIComponent is a good defensive practice for query parameters.

Suggested fix

-        const response = await fetch(`/api/auth/signup?lang=${language}`, {
+        const response = await fetch(`/api/auth/signup?lang=${encodeURIComponent(language)}`, {

community/error-localization-engine/lingoClient.js (1)

32-42: Mock mode doesn't handle nested objects.

The mock translation only processes top-level string values. Nested objects are copied as-is, which may produce inconsistent behavior between mock and API modes. This is acceptable for the demo's use case (flat error objects), but worth documenting.

For a more robust mock (optional enhancement):

Recursive mock translation

+    const mockTranslateObject = (obj) => {
+        const translated = {};
+        for (const [key, value] of Object.entries(obj)) {
+            if (typeof value === 'string') {
+                translated[key] = mockTranslate(value);
+            } else if (typeof value === 'object' && value !== null) {
+                translated[key] = mockTranslateObject(value);
+            } else {
+                translated[key] = value;
+            }
+        }
+        return translated;
+    };
+
     if (isString) {
         return mockTranslate(content);
     } else {
-        const translated = {};
-        for (const [key, value] of Object.entries(content)) {
-            if (typeof value === 'string') {
-                translated[key] = mockTranslate(value);
-            } else {
-                translated[key] = value;
-            }
-        }
-        return translated;
+        return mockTranslateObject(content);
     }

community/error-localization-engine/verify.js (1)

19-87: Verification can pass on unexpected status codes and never fails the process.
Right now any error response (even 500) can still report PASS, and the script exits with code 0. This makes automated verification unreliable. Consider tracking failures, asserting expected 400s, and setting a non‑zero exit code.

🛠️ Suggested tightening of verification behavior

 async function runTests() {
-    
+    let failed = false;
+
     console.log('--- Starting Verification ---');
@@
-        if (err.response) {
+        if (err.response) {
+            if (err.response.status !== 400) {
+                failed = true;
+                console.log(`❌ FAIL: Expected 400, got ${err.response.status}`);
+            }
             console.log('Response Status:', err.response.status);
             console.log('Response Body:', err.response.data);
             const msg = err.response.data.message || '';
             if (checkLocalization(msg, 'es')) {
                 console.log('✅ PASS: Localized to Spanish');
             } else {
+                failed = true;
                 console.log('❌ FAIL: Not localized correctly');
             }
         } else {
+            failed = true;
             console.error('❌ FAIL: Network/Server Error:', err.message);
         }
     }
@@
-        if (err.response) {
+        if (err.response) {
+            if (err.response.status !== 400) {
+                failed = true;
+                console.log(`❌ FAIL: Expected 400, got ${err.response.status}`);
+            }
             console.log('Response Status:', err.response.status);
             console.log('Response Body:', err.response.data);
              const msg = err.response.data.message || '';
             if (checkLocalization(msg, 'fr')) {
                 console.log('✅ PASS: Localized to French');
             } else {
+                failed = true;
                 console.log('❌ FAIL: Not localized correctly');
             }
         } else {
+            failed = true;
             console.error('❌ FAIL: Network/Server Error:', err.message);
         }
     }
@@
         if (res.data.message && !res.data.message.includes('[')) {
              console.log('✅ PASS: English default (no mock prefix)');
         } else {
+             failed = true;
              console.log('❌ FAIL: Unexpected content in success message');
         }
     } catch (err) {
+        failed = true;
         console.error('❌ FAIL: Unexpected Error:', err.response ? err.response.data : err.message);
     }
+
+    if (failed) process.exitCode = 1;
 }