Locales folder and undesired includes in installer

[hawkins]

So I've worked through this writeup, and have arrived at a usable installer for my Electron application. However, my application is for use in a small community where multiple locales is not necessary. I can't even determine what is causing the creation of all of these locales.

How can I prevent the locales folder (and other various undesired includes) from being created and included in installation?