app/views/admin/trade_codes/_form.html.erb
<%= form_for resource_instance_name, :url => collection_url, :remote => true do |f| %>
<%= error_messages_for(resource_instance_name) %>
<label>Code</label><%= f.text_field :code %><br />
<p>Name</p>
<label>EN</label> <%= f.text_field :name_en %><br />
<label>ES</label> <%= f.text_field :name_es %><br />
<label>FR</label> <%= f.text_field :name_fr %><br />
<% end %>