title: WooCommerce custom checkout field for 1 country only
body: <p>I have a webshop in 5 languages now and we sell and ship our products all over Europe. I've made custom checkout fields in WooCommerce without problems.</p>
  
  <p>For 1 country (Norway) we need to add an extra field (PID number). That's no problem, but it should only be visible for Norway. All other countries shouldn't see this custom checkout field.</p>
  
  <p>How do we make a custom checkout field for 1 Country only?</p>