With Prestashop, make sub domain for each language

Hi, I got a french website under Prestashop 1.6 my main domaine is www. EXAMPLE .com , wich is in french language. all my seo work is made with this url now i want multi language, with the same prestashop and subdomains : en. EXAMPLE .com => english language www. EXAMPLE .com => french language de. EXAMPLE .com => deutsh language es. EXAMPLE .com => spanich language The task : - you will make sub domains - you will make it work ([login to view URL] => [login to view URL]) - i will translate my self Important: - i don t want to lose my seo, so don t move [login to view URL] (if you active multilanguage, url will change to [login to view URL] .. i don t want it). [login to view URL] should stay in french! - all modules should work under subdomain (paiement etc) - shop is in produce mode (not in test mode), so please don t make me lose my customers ;-) If you really understand, please describe what you will do in answer. Thank