I see odd data for Azerbaijani and Bulgarian Wikipedias in the pageviews tool.
The most striking examples are from Azerbaijani:
You can see a jump up starting towards the end of October.
The most popular page, by far, is called "xss":
You can see something similar also in Bulgarian, although on a much more modest scale:
And there, too, "xss" is the most popular page by far, though not as extremely as in Azerbaijani:
I don't see anything similar in other languages.
In both languages, "xss" is a page that doesn't exist.
I noticed these two languages, because they appeared to have strangely skewed data about interlanguage links clicks, which I'm tracking regularly.
It would be nice to understand why does this happen.
This reminds me slightly of T141506, although the reason is possibly different.