In 1995, a Netscape Employee Wrote a Hack in 10 Days That Now Runs the Internet

Yes. But that prototype was in CL.

I also always thought that he set out or implement a Scheme-like language but got told to make it look like Java.

Scheme is a LISP of course, just not Common Lisp.

I have no idea what language the original implementation was in but it makes sense it would be the same as the rest of the browser.

I went to a talk by Eich in the late 90s. He explicitly mentioned scheme

JS on the server seemed to me to be a solution looking for a problem. We already had plenty of arguably adequate server side languages. JS was the weird language you were forced to code in for the browser so why on earth would you want to use it elsewhere? Well I suppose the answer was "because there's a zillion people who know how to use it". But that wasn't true until it was.

[delayed]