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Hello! My site currently serves content in german and english, however without having separate URLs (it depends on Accept-Language and has a submitform for changing language based on set cookies). The site appears extremely well in the search engine, with many keywords ranking at #1-10. They appear on the german and english google search, with the first one bringing the best results. It's however the english site that appears in the results. I want to change to a better approach by having subdirectories for each language, as I'm extending the site, I know how to do this but I have found -nowhere- any infos on how to preserve my search engine ranks? If I keep the english version as homepage and send german visitors to /de/, might this kill my position in the german search engine which is very important, as the new frontpage under /de/ would become more relevant and the english one maybe less? Or should I keep the german version the default one and send english visitors elsewhere? What happens with my search positions, if I have no side on the / but visitors are always send to either /en/ or /de/? Every help is greatly appreciated, as I found a lot of articles everywhere on how to make a multilingual site, but nowhere anything on how it affects current search results.