Using Gettext for internationalization

For internationalization with gettext, the locale used within your Plug pipeline can be stored in the Plug session and restored within your LiveView mount. For example, after user signs in or preference changes, you can write the locale to the session:

def put_user_session(conn, current_user) do
  locale = get_locale_for_user(current_user)
  Gettext.put_locale(MyApp.Gettext, locale)

  conn
  |> put_session(:user_id, current_user.id)
  |> put_session(:locale, locale)
end

Then in your LiveView mount/3, you can restore the locale:

def mount(_params, %{"locale" => locale}, socket) do
  Gettext.put_locale(MyApp.Gettext, locale)
  {:ok socket}
end