Фархад Фаткуллин, 18/11/2015 13:11:
One clearly notable trend observed in both Russia and Turkic Wikipedias groups is seasonality in the number of visit, except for the Wikis that have some sort of organization taking care for them (growth for Russian, Ukrainian, Turkish, relatively stable for Azeri, Kazakh and Finnish vs. x2-3 times decrease for all others in both groups).
Seasonality means (recurring) oscillation, why do you oppose it to growth? From a quick look, all the languages you put in "growth" have seasonalities: https://stats.wikimedia.org/EN/TablesPageViewsMonthlyOriginalCombined.htm
Nemo