title: How to change spell checker language
body: <p>I'm using Poedit/1.8.11 on Windows 10 to manage translations for a CakePHP project, namely English and Spanish.</p>
  
  <p>For each catalog, I've chosen the translation language from the drop down list so I presume they are correct:</p>
  
  <p><img src="https://i.stack.imgur.com/0DGdN.png" alt="Catalogue properties"></p>
  
  <p>In source *.po they look like this:</p>
  
  <ul>
  <li><code>"Language: en_GB\n"</code></li>
  <li><code>"Language: es_AR\n"</code></li>
  </ul>
  
  <p>Nonetheless, spell checker is checking both translations as Spanish. The program does not seem to recognise the language and I can't find any menu item to pick it manually:</p>
  
  <p><img src="https://i.imgur.com/SFEw5sK.png" alt="Spell errors"></p>
  
  <p>Online help does not even mention spelling. How do you set the spell checking language in Poedit?</p>