Earlier quoted context omitted.
It works if you're learning the language while you're in a place where it's spoken.
But then one got to wonder why not spend that time learning in the wild. People have forgotten how it works I suppose. It would take less energy. There are a few options to learn a language. Some say immersion. What's most effective for the brain to capture and memories is _needs_. We tend to learn languages out of a desire to add them to our skill belt. Or out of fun. And we are having a hell of a time this way. Duo…
That said, relatively casual language learning isn't likely to yield a lot outside of essentially entertainment value. I had four years of high school French which likely tops the relatively casual bar. On the one hand, I classify my French as pretty terrible. On the other hand, I've traveled to Paris with a friend who doesn't know any French and it makes me realize I actually do have a bit of working knowledge especially when it comes to reading.