diff --git a/back/src/admin/app.js b/back/src/admin/app.js
new file mode 100644
index 0000000..8d08d2d
--- /dev/null
+++ b/back/src/admin/app.js
@@ -0,0 +1,16 @@
+module.exports = {
+  // Custom webpack config
+  webpack: (config, webpack) => {
+    // Note: we provide webpack above so you should not `require` it
+    // Perform customizations to webpack config
+    // Important: return the mutated config
+    return config;
+  },
+
+  // App customizations
+  app: (config) => {
+    config.locales = ["es", "en"];
+
+    return config;
+  },
+};