title: How to localize ActiveModel::Error message
body: <p>When I validate a model I get the following error</p>
  
  <pre><code>&lt;ActiveModel::Errors:0x007ffecf1c9460 
  @base=#&lt;Post id: nil, created_at: nil, label_id: nil, user_id: 3&gt;,
  @messages={:label=&gt;["can't be blank"]},
  @details={:label=&gt;[{:error=&gt;:blank}]}&gt;
  </code></pre>
  
  <p>How can I customize the error message?</p>
  
  <p>From my understanding, the following should work</p>
  
  <pre><code>en:
    activerecord:
      errors:
        models:
          post:
            attributes:
              label:
                blank: do not like it
  </code></pre>
  
  <p>However, I still get the default error message.</p>