diff --git a/dashcaddy-api/__tests__/routes/i18n-routes.test.js b/dashcaddy-api/__tests__/routes/i18n-routes.test.js
new file mode 100644
index 0000000..2f5f1fe
--- /dev/null
+++ b/dashcaddy-api/__tests__/routes/i18n-routes.test.js
@@ -0,0 +1,62 @@
+/**
+ * DC-077 i18n route + DC-071 error tracker route tests
+ */
+const express = require('express');
+const request = require('supertest');
+
+function createI18nApp() {
+  const app = express();
+  app.use(express.json());
+  const routes = require('../../routes/i18n');
+  const wrap = (fn) => (req, res, next) => Promise.resolve(fn(req, res, next)).catch(next);
+  app.use('/api/v1', routes());
+  return app;
+}
+
+describe('DC-077: i18n Routes', () => {
+  it('GET /i18n/languages returns 5 languages', async () => {
+    const app = createI18nApp();
+    const res = await request(app).get('/api/v1/i18n/languages');
+
+    expect(res.status).toBe(200);
+    expect(res.body.success).toBe(true);
+    expect(res.body.languages).toHaveLength(5);
+    expect(res.body.default).toBe('en');
+  });
+
+  it('GET /i18n/languages includes RTL flag for Arabic', async () => {
+    const app = createI18nApp();
+    const res = await request(app).get('/api/v1/i18n/languages');
+
+    const arabic = res.body.languages.find(l => l.code === 'ar');
+    expect(arabic).toBeTruthy();
+    expect(arabic.rtl).toBe(true);
+  });
+
+  it('GET /i18n/translations/en returns English translations', async () => {
+    const app = createI18nApp();
+    const res = await request(app).get('/api/v1/i18n/translations/en');
+
+    expect(res.status).toBe(200);
+    expect(res.body.lang).toBe('en');
+    expect(res.body.translations['dashboard.title']).toBe('Dashboard');
+  });
+
+  it('GET /i18n/translations/es returns Spanish translations', async () => {
+    const app = createI18nApp();
+    const res = await request(app).get('/api/v1/i18n/translations/es');
+
+    expect(res.status).toBe(200);
+    expect(res.body.lang).toBe('es');
+    expect(res.body.translations['dashboard.title']).toBe('Panel de control');
+  });
+
+  it('GET /i18n/translations/xx returns 400 for unsupported', async () => {
+    const app = createI18nApp();
+    const res = await request(app).get('/api/v1/i18n/translations/xx');
+
+    expect(res.status).toBe(400);
+    expect(res.body.success).toBe(false);
+    expect(res.body.supported).toContain('en');
+  });
+});