What's the proper i18n ally configuration for a fe/be monorepo?

Question

I have a project with:

• backend (Express app)

  • locales/
  • src/
  • package.json

• frontend (React app)

  • src/
    • locales
  • package.json

If I open frontend or backend in VSCode (as if they were the root folder, the plugin works as expected), but if I open directly the root folder in VSCode the plugin cannot automatically recognize the config.

What's the proper configuration for this folder structure?