Since games are coded in Unreal in C++ and V8 can be embedded in any C++ project I find it will be very helpful if developers can write in JavaScript instead of C++.
Can I turn this into a feature request or have I misunderstood anything?
Unity did (does?) multiple languages…
It was a pain in the rear end, two sets of documentation for everything, every second tute was in the other language that you didn’t use…
Tower of Babel, don’t do it Epic 
Just bite the bullet and learn C++ is my advice.
This have been discussed to death already. Use the search tool…