Language learning has a lot of quirks and this just isn't the case for most people who didn't learn a language early on, and if you're immersed/actively using t

Language learning has a lot of quirks and this just isn't the case for most people who didn't learn a language early on, and if you're immersed/actively using the language then you're way less likely to forget. Your daily usage and exposure is simply your spaced repetition. If one is bilingual at an early age, then it's much easier to learn/retain additional languages. Most language learning in America starts kids off much later than it should (middle or high school). Full immersion is also a great way to learn. And as far as SRS goes, it's important to not make cards if you think they're not necessary as it's easy to just make the whole review process too much to chew on. And sometimes you can cluster information in a single card (maybe a sentence that's an idiom if using language as an example) such that you do get continued exposure, and can decide later if you need to break it up if you can't recall some parts of it.