I think normal people are actually aware what JS and HTML are. Most people are more tech savvy than we give them credit - or credit they might give themselves.
I think normal people don't know the difference between google and a web browser. Even many of the ones that used to understand the difference forgot some time after their primary computing device became a locked down phone.
Can confirm. My wife (who is a very normal person) was using bing the other day and when I pointed it out she asked me what I was talking about and pointed to the chrome browser icon in the taskbar. The level of confusion is almost unfathomable to us.
Yes for normal teenagers in the early 2000s or so (MySpace encouraged experimentation and there were many sites where people would upload copy/pastable javascript snippets for their sites), outside of that group I'm not so sure.