Hi,
I have on different occasions had the issue of the package manager Guix
hinting that locales were not installed or that GUIX_LOCPATH was not set,
even though they were. Today I went to the bottom of the issue [0] and have
found what in my opinion is the root cause:

Despite its name, the package glibc-utf8-locales does not contain all
utf8-locales. There is nothing in the name that makes this apparent to the
user, especially given that the package named glibc-locales contains all
locales.

My suggestion then is to change this package name from glibc-utf8-locales
to glibc-limited-utf8-locales to make this distinction apparent to the
user.

The package name was mentioned enough times in the code of guix that I
hesitate to submit a patch with
s/glibc-utf8-locales/glibc-limited-utf8-locales/ run over the codebase. But
perhaps it is that easy.

[0]: https://unix.stackexchange.com/questions/689761