Uttered "Paul W. Frields" (pfrields) fedora-docs-commits@redhat.com, spake thus:

Let's generate new entities for a document at build time, into a real file.

Let's don't. This is a bad idea because it's yet another duplicated file in the local directory that adds NO new information and cannot be used for adding local entities because it creates a new file every time the locale is changed. Heaven help us if someone archives this file.

set-locale-${1} is not the right place for this.

I'm on this.