Fortunately, any well-designed (from a back-end perspective) site should have no problem presenting the relevant information both on the relevant page and on a catch-all FAQ document. This would allow the site to elegantly handle everything properly.
Source: Working at a startup with a wide audience. The email consisting only of the subject line "WHAT IS PASSWORD" was not the least-savvy email received.
I know a lot of my peers would know what FAQ means and what a password is. Even some of the "less" tech savvy people. But late adopters who are still using 10 year old PCs usually don't know.
Before I hear claims of ageism, it is just a fact that a higher percentage of the older generations don't know how to use computers. It isn't ALL of them but they didn't have the benefit of growing up with computers as a tool, to the point where they become second nature.