title: Rails form_with change submit text
body: <p>I'm creating a new form using form_with helper and as you know is detecting if you are on a new record page or a edit page ([following the CRUD example from rails guide][1], i render the form as a partial to reuse the form) changing the text on the submit button depending where i call the form.</p>
  
  <pre><code>&lt;%= form_with model: @article, local: true do |form| %&gt;
     &lt;p&gt;
         &lt;%= form.label :title %&gt;
         &lt;%= form.text_field :title %&gt;
     &lt;/p&gt;
     &lt;p&gt;
         &lt;%= form.submit %&gt;
     &lt;/p&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p>But i want to the text on the form submit helpers for translating purpose, but I don't know if is possible to preserve the Create/Update recognition functionality and if there are some helper or class where I can configure those labels. </p>