The website i am working on is translated to 8 languages (English, Chinese, Japanese, Arabic, Hindi, Russian, Spanish and Portuguese).
Each time the user select a language, the URL stays the same as i am using a combination of defined variables to change the languages. For example, the URL for the English version (mysite.com) looks like the Chinese version.
My Question: Do i need to specify a certain HTML tag to inform search engines that my website is in 8 languages? if yes, what are the necessary tags and how to define them?
As an extra question, does this technique in translating the website bad for SEO?