I have checked a variety of languages, and it seems to happen consistently for all Latin-script language Wikipedias. Some examples:

• Norwegian Bokmål – https://stats.wikimedia.org/#/no.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Norwegian Nynorsk – https://stats.wikimedia.org/#/nn.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Icelandic – https://stats.wikimedia.org/#/is.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Faroese – https://stats.wikimedia.org/#/fo.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Swahili – https://stats.wikimedia.org/#/sw.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Cebuano – https://stats.wikimedia.org/#/ceb.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Waray-Waray – https://stats.wikimedia.org/#/war.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Aymara – https://stats.wikimedia.org/#/ay.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Inari Sámi – https://stats.wikimedia.org/#/smn.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Igbo – https://stats.wikimedia.org/#/ig.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly (with an even bigger spike in September, unlike the others)

Compare to languages with non-Latin scripts:

• Yiddish – https://stats.wikimedia.org/#/yi.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Armenian – https://stats.wikimedia.org/#/hy.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Egyptian Arabic – https://stats.wikimedia.org/#/arz.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• Standard Moroccan Tamazight – https://stats.wikimedia.org/#/zgh.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly
• N'Ko – https://stats.wikimedia.org/#/nqo.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly

(Curiously, the Dhivehi Wikipedia – https://stats.wikimedia.org/#/dv.wikipedia.org/reading/total-page-views/normal|bar|2-year|agent~user|monthly follows the Latin-script pattern.)

Maybe this is related to this problem that I reported a month ago?

Hi there! Any progress? I am from afwiki.

Desktop "viewers" from countries where few people speak the language – the Philippines, India, Japan:
https://stats.wikimedia.org/#/hr.wikipedia.org/reading/page-views-by-country/normal|map|last-month|(access)~desktop*mobile-app*mobile-web|monthly
https://stats.wikimedia.org/#/hr.wikipedia.org/reading/unique-devices/normal|line|1-year|access-site~mobile-site*desktop-site|daily

https://stats.wikimedia.org/#/sv.wikipedia.org/reading/page-views-by-country/normal|map|last-month|(access)~desktop*mobile-app*mobile-web|monthly

Hi @jhsoby-WMNO would you be able to assist us in getting this ticket assigned to someone? This is making our stats unreliable.

Hi Guys! Our January 2026 pageviews are even worse! We need your assistance! Regards!

Hi @Milimetric and @JAllemandou, would you be able to assist us in getting this ticket assigned to someone. The problem is causing wikistats to no longer be a reliable source of page views and related stats. We don't have an alternative source for these stats, and are not sure what else to do about it.

Your assistance would be greatly appreciated.

Ping @Ahoelzl and @GGoncalves-WMF for prioritization.

Thank you so much for pinging. This is suspicious indeed, and especially interesting is @jhsoby-WMNO's finding about non-latin wikis.

@Hghani points out (on a first look) that this can be related to T413027. That ticket also hints at some signals we can incorporate into our classification from here.