title: Translating react-admin network error notifications
body: <p>I'm trying to display a custom translated notification when the API throws an exception.</p>
  <p>By default, when getting a 409 conflict response, <code>react-admin</code> shows a red notification with the text &quot;Conflict&quot; (see attached screenshot).</p>
  <p>How can I translate this message?</p>
  <p><a href="https://i.stack.imgur.com/KDCiT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KDCiT.png" alt="enter image description here" /></a></p>