In short: people across the globe have been learning Ukrainian to express their solidarity with the victims of Vladimir Putin’s aggression. At the same time, the growth of Russian has slowed, which, in relation to the rate of uplift in app users overall, amounts to a decline.
Didn't see this propaganda-spewing #### learning Farsi a few years back.....
Several people pointing out the various political actions AGAINST Russian speakers by Ukr in the comments, mostly being shouted down.