New Locale Adaptive Pages:
Google introduced its new locale-aware crawl configurations for Googlebot for pages it detects may adapt their content based on the request’s language and perceived location. New Locale-adaptive pages change their content to reflect the user’s language or perceived geographic location. Previously, Google didn’t handle that well or actually at all – they would just see the U.S.-English version of the web page.
Now Google will be able to handle such content by sending GoogleBot from different IPs across the world, as well as let it set language settings. Here are the two methods:
Geo-distributed crawling where Googlebot would start to use IP addresses that appear to be coming from outside the USA, in addition to the current IP addresses that appear to be from the USA that Googlebot currently uses.
Language-dependent crawling where Googlebot would start to crawl with an Accept-Language HTTP header in the request.
Confirm that your website configuration supports locale-aware crawling.
The new configurations are enabled automatically for pages Google detects to be locale-adaptive, and the company warns you may notice changes in how it crawls and shows your site in search results even if you haven’t changed your CMS or server settings.
These new configurations do not alter our recommendation to use separate URLs with “rel=alternate hreflang annotations” for each locale. Google continue to support and recommend using separate URLs as they are still the best way for users to interact and share your content, and also to maximize indexing and better ranking of all variants of your content.