I run by chance into this story of SEO analysis of domains- hopefuly this is not offtopic here:

https://blog.searchmetrics.com/us/2018/02/14/seo-world-rankings-2018/

Obviously I don't know how scientific the study is, but there seems to be 2 conclusions regarding Wikimedia- Brazil seems to be behind in Wikipedia adoption (or just Google SEO?), and a big growth of wiktionary.org in the last year.