We all know that G have a nice little translation service. Lets make an example. I have a site in german about cars. The site is obviously built for german people and hence, it´s on a german .de domain. Now, I post a comment to a blog written in english (or submit and article). That blog is in english and the subject are the same as my german site. Will Google then translate the blog page and understand that our sites are actually about the same subject?