title: Define website language through subdomain or subdirectory (es.example.com or www.example.com/es)
body: <p>I'm about to launch a multi-lingual website and I have to decide whether to define the site's language through a subdomain or a subdirectory. For example:</p>
  
  <p><strong>es</strong>.example.com --or-- www.example.com/<strong>es</strong></p>
  
  <p>In every possible aspect (not only for SEO purposes), what are the implications of using either method? What would be the best practice?</p>