With the help of Google Webmaster tool sitemap and through html link tag it is very easy to communicate regional / language centric content to search engine. For example, if a business serves different regions / global audience (like US, Uk, India, Japen) and has Section / webpages caters to those specific regions. (Example: digitalmarketinganalytics.net/US, digitalmarektinganalytics.net/uk, etc). Using Sitemap or my webpage tags, it is very easy to communicate the regional / language based sections in the portal to search engine. For more details, pls. check below link.
Inference: Google wants to serve more relevant / localized content to local audience. Because there is significant % of audience connecting internet through mobile. Google try to serve localized content to leverage on mobile audience.