title: How to properly use lang in HTML
body: <p>I want to ask you how to properly use lang in HTML code.
  Im trying to have website in 2 langs en, pl.</p>
  
  <pre><code>&lt;html lang="en"&gt;
  &lt;html lang="pl"&gt;
  </code></pre>
  
  <p>Is this way correct?</p>