class ActionDispatch::PublicExceptions

def render_html(status)
  path = "#{public_path}/#{status}.#{I18n.locale}.html"
  path = "#{public_path}/#{status}.html" unless (found = File.exist?(path))
  if found || File.exist?(path)
    render_format(status, "text/html", File.read(path))
  else
    [404, { Constants::X_CASCADE => "pass" }, []]
  end
end