I went to school with a number of classmates who were headed into the legal profession. What many if not most of them do (or did when I was in college) is to major in either English or Philosophy. Philosophy was considered the better choice of the two by most law candidates I knew, because it better prepared you to read a lot. The ability to read an incredible volume of material (and of course, remember it!) is what the study of law is all about.
Reading is "where it's at," not necessarily the construction of that charming language of law. You wind up reading so much case law that the language becomes second nature without you having to study it as a separate subject. Learning to read, as well as write, in legalese, is just a byproduct of all that work absorbing mountains of material. If there is a specialized course in the language of the law, it is probably intended for people not actually going into the profession. But then, why would anyone not going into law want to study that?
Legalese is basically just another type of jargon. It just happens to be a lot more involved than most collections of jargon.
A lot of legalese is based on Latin, so it would probably behoove a student in high school planning on a legal profession, to take Latin when it is offered. Beyond that, I would be as interested as are you, in whatever additional course work in the actual language of law is even offered to students.
I would be very interested in the input of Peanutbred on this question, as he seems quite knowledgeable on the legal profession. My classmates may have missed a trick or two.



