title: Editing simpleform locales to enable custom error messages
body: <p>I have a form within my app that I build using simple_form.  What I am trying to do is edit my error messages to something a little different than the default.  I am working on my <code>simple_form.en.yml</code> file and I think that may be where my problems are happening. </p>
  
  <p>With what I have, i'm not sure I understand what exactly goes in the settings file, and I am hoping someone can go over what I have and advise me on where to go. </p>
  
  <p>My model is like so (this is my entire model)</p>
  
  <pre><code>class FormSubmission &lt; ActiveRecord::Base
    after_create :email_sales
  
    validates :first_name, :last_name, :organization, :email, :phone, :recognition, :inquiry, presence: true
  
    private
  
    def email_sales
      FormSubmissionMailer.update_sales(self).deliver_now
    end
  end
  </code></pre>
  
  <p>Here is one of the areas of my view</p>
  
  <pre><code>= simple_form_for @form_submission do |f|
  
    .fieldSet.span8
      .field.reco
        = f.input :first_name, input_html: { class: "formStyling" }, label: "First name", required: false
  </code></pre>
  
  <p>Finally, in my <code>simple_form.en.yml</code> file I have this here</p>
  
  <pre><code>en:
    activerecord:
      errors:
        models:
          formsubmission:
            attributes:
              email:
                blank: "cannot be empty"
  </code></pre>