diff --git a/app/vite.config.ts b/app/vite.config.ts
index 503f4bd..2611238 100644
--- a/app/vite.config.ts
+++ b/app/vite.config.ts
@@ -17,7 +17,10 @@ export default defineConfig({
     paraglideVitePlugin({
       project: "./project.inlang",
       outdir: "./src/paraglide",
-      outputStructure: "message-modules",
+      // Paraglide 2's default: one module per locale in the dev server and tests (a few requests),
+      // one per message in production builds (tree shaking). v3 would serve virtual modules only Vite
+      // can resolve.
+      outputStructure: process.env.NODE_ENV === "production" ? "message-modules" : "locale-modules",
       strategy: ["baseLocale"],
     }),
   ],