In case you missed it, a Spanish thread was also added at the same time…
It just didn’t take off with the same fervor.
Russian Language speakers (not just citizens of Russia the country), including people in Ukraine, Belarus, Kazakhstan etc etc just happened to be the biggest non-english speaking group who used the forums at the time, by far, which is why the test included the Russian language among the first languages.
If Envato had the biggest community subsection of users speaking e.g. Chinese, maybe that would have been among the first test languages…
But yeah just like many people speak English outside of England, as a first or second language, just like many people speak Spanish outside of Spain, many people speak Russian outside of Russia.