Actually it does - it tells you where to start with both webmaster mode and the languages area. It also tells you taht the template that controls the home page is customer/main/welcome.tpl. If you look at that template, you see that it calls the featured products template, customer/main/featured.tpl. If you look at that template, you will see which language variables control the text that is displayed. See how that works? The template system is complicated, but if you follow the simple steps outlined in my template editing guide you'll quickly get the hang of it. You can also refer to the
manuals.