Google search for site:yourdomain.com and you'll see what Google has cached/stored as results.
If you end up with hundreds of strange results from Google
leading to pages like: /en/admin/reports/access/13745 /bg/admin/reports/access/13745
FIRST, user permissions -> anonymous users should not have access to:
statistics module -> access statistics
(But you may want them to see "view post access counter" to see how often a post has been read)
ALSO, the default /drupalroot/robots.txt does not cover scenarios with the leading language...
you must manually update robots.txt
Disallow: /admin/ Disallow: /bg/admin/ Disallow: /en/admin/