If your web browser language is set to any other language then english and that you click on any wiki page in Google search results, you end on a blank page. I suspect that this might happen quite often. This is due to how urls are referenced by Google and how the bitcoin wiki handles url translations.
For instance if you get this url from Google :
https://bitcoin.it/wiki/SoftwareThe Bitcoin wiki will automatically convert it to :
https://en.bitcoin.it/wiki/Software or
https://fr.bitcoin.it/wiki/Software based on your browser language.
In the later case, the page doesn't exist, therefore it is a bug.
The bitcoin wiki could be modified to 301 permanently redirect to english, or to temporarily redirect (302) to the right translated page and fallback to english when the page doesn't exist. Is there someone with sufficient access to allow such a fix?