I have recently started a CMS project in PHP, the site will be multilingual. Assumptions are as follows:
- 2 languages in the beginning (pl-pl, en-gb)
- language auto detection based on browser language
- for all other languages than the above, fallback is en-gb
- site will have links to change language, but they will be shown as ajax / js widget!
I know from my experience that sometimes there are problems with correct googlebot indexing for home page. My question is whether Google Bot is able to index both language versions of the website, and whether I should use subdomain (en.webpage.com) or php get (webpage.com/index.php?lang=EN) to see the best results.