We are thinking about expanding to do business in Spain. I would like you to pretend that you're a consultant that I have hired to help me understand the business environment in Spain. I want you to focus your recommendations on the implications for me as the head of HR. I am interested to know about labor laws in some detail. I don't understand local business etiquette and language expectations. I don't know anything about the public holidays and if they are same across the whole country. Please be detailed in your response.