My friend is looking for a resource to become fluent in French, he is forced to work with it. Asked to find a certain book, but it is not yet pirated on the resources of the wiki. My guess is that pirates have better alternatives for such a thing, so I’m launching a discussion.
I only ever heard about the book “Minna no Nihongo” in the context of learning Japanese.
And a lot of native speakers just straight up use incorrect grammar. eg loads of native English speakers say things like “could of”, use “then” instead of “than”, use punctuation incorrectly, do incorrect sentence structure, etc.
I don’t mean to be prescriptive about language. Of course it evolves based on usage. But in any formal environment, such as an academic environment, there are still certain defined and canonised English grammar rules that you would be penalised for breaking, and most learners want to learn those rules even if most casual speakers don’t follow them.