I currently have a website that is in 4 languages with 4 different subdomains. The pages are all on my root folder of my site in alphabetical order. How important is structuring my site in some type of hierarchy for SEO. I make frequent/daily changes to my site, and each time I upload it to the server it goes back into alphabetical order. Also is it okay to have all languages in one sitemap that I submit into Google & Bing. I appreciate the assistance!