def flash_success(message = nil, opts = {})
    if message
      flash[:success] = message
    else
      flash[:success] = translate '.flash.success_html'.freeze, view_assigns.symbolize_keys.merge(opts).merge(default: :"flash.default.success")
    end
  end

  def flash_error(message = nil, opts = {})
    if message
      flash[:error] = message
    else
      flash[:error] = t '.flash.error_html'.freeze, view_assigns.symbolize_keys.merge(opts).merge(default: :"flash.default.error")
    end
  end

  def flash_custom(type, message = nil, opts = {})
    if message
      flash[:type] = message
    else
      flash[:type] = t ".flash.#{type}_html".freeze, view_assigns.symbolize_keys.merge(opts).merge(default: :"flash.default.#{type}")
    end
  end

ru:
  flash:
    default:
      success: 'Действие выполнено успешно'
      error: 'Действие было выполнено с ошибкой'
  feedbacks:
    new:
      flash:
        success_html: "hello %{email}"
        
        
flash_error 'hello', email: current_user.email
flash_error 'hello'
flash_success
flash_custom :notice
flash_custom :notice, 'hello'