Google indexes the number of pages of a site differently depending on your browser language. Why?

Question

I was checking site:site.com in Google.co.uk and I changed my browser language to German and the number of pages indexed was vastly different.

I understand the results are different based on the TLD you use to search, but why would it change based on browser language?

Answer 1

Google warns, that the number of urls displayed by site-query is not reliable.

In some cases it seems to be reliable. Google maintains a big amount of data centers, where the indexing database should be mirrored. But it is not always a case. Google has its own queue of data, which should be mirrored first. The number of indexed urls has not the first prio.

Even the number of indexed urls in your search console is not 100% reliable - well, it is, but it has delays too.

The main cause for unreliability of these data is the lack of 100% real time mirroring of all data Google has. But we can't expect this from Google too.

The only art to be sure about the number of indexed urls is to scrape SERPs by your own, with iMacro or the like. For some critical projects with not so much urls it is the best method for me - iMacro with a kind of Windows automation to start a browser and run iMacro.

Answer 2

The only true way to determine how many pages are indexed by Google is in the Google webmaster console here: https://www.google.com/webmasters/tools/index-status?hl=en&authuser=0&siteUrl=

Using site:example.com in your search is only so reliable in determining how many pages are actually indexed.

It also makes sense for Google to index pages with German language in their German search engine, to index English pages in the American search engine, and to index Indian pages in the Indian search engine.

It wouldn't make much sense for Google to index pages with German language in their Indian search engine.