There is no set of courses that will properly prepare you for law school. As such, schools typically look to your overall performance in whatever subject matter you choose to pursue. However, there may be a slight preference given to the liberal arts (history, english, government, etc) as courses in these subjects usually have heavy writing components.

So unless those Spanish classes will allow you to get college credit, then there’s not much point unless you want to look good for the college you’re trying to get into. Even then, it’s not necessarily required. Each law school is different.