Or a second language later in life while trying to achieve a native sounding accent. Yeah, you can sound fluent just fine. My complaint with brain plasticity with age and language learning is that… well… when you’re younger you have more _time_ to learn something and are less burdened by chores, work, obligations, kids, and so on.
Turns out that if you use the language as much as a native person, with special attention to accent development, you can achieve high proficiency just fine.
I meant specifically that improvements can be made latently between active practice, in the case of actual improving neuroplasticity as an adult the book Peak echoes exactly what you're saying, I've seen people here also suggest the keto diet can contribute but haven't explored the evidence.
