Unfortunately, Duolingo ignores this flag for many animations, and more than half of the screens are still animated.

I find the animations Duolingo uses to be obnoxious distractions, and I want them to be actually disabled when I tell it this. I also want this kind of thing to be switchable on a per-app level, so that I have a way to override the (I assume) opinion of the art department or the marketing person that thinks these animations are engaging or fun without having to also disable the non-obnoxious animations my other apps have.

(Mind you, at this point I'm thinking Duolingo has been a lost cause for the last few years; although the courses seem to still be improving, the UX has been getting worse faster).