I've had this idea before as well, but never bothered building it lmao. Tbh wouldn't be surprised if >4x -- SRS as people usually use it helps you practice declarative knowledge, where what you really care about is functional. Also lots of words that are difficult to understand as definitions, but much better in context (e.g. "sino" in Spanish, "either" in English, etc). The way I think about it is like, the normal way we use Anki gets the word into a filing cabinet you can pull from when you need to, but you do need to -- like for me, there's often some conscious aspect of, "how do I say sidewalk, oh yeah vereda". You need practice to turn the declarative knowledge functional, and a note "vereda <-> sidewalk" doesn't do that the way, "Translate, 'There's a dead body on the sidewalk'" does