One thing that is often gets unmentioned in "how-to-learn-x-in-y-days" discussions (whether x is a programming language or a "human" language) is that learning an (n+1)th language is a lot easier than learning your first (or in the case of human languages second) language. Not just because you discover patterns but also because you sharpen your methodologies - with human languages you'll know which is the best way fo…
This is very true, and I think it's one of the reasons that Esperanto works so well as one's first second language. (I recall seeing one study where a group of students who learned Esperanto for one year and then French for three years ended up knowing French better than a group of students who studied French exclusively for four years straight. Not conclusive by any means, but suggestive.) By eliminating the complic…
The parent comment to your comment expressed the idea that ANY previous language aids learning the next language. This has been my experience, after learning elements of about a dozen languages, with proficiency in Chinese such that I can support myself through interpreting Chinese into English or the other way round, or translating from Chinese into English.
For scientifically based information on Esperanto, see