Moodle 3.7 - English not fully supported

Re: Moodle 3.7 - English not fully supported

by Ryan B -
Number of replies: 0
Also note, I have read https://docs.moodle.org/37/en/Language_FAQ#Warning_message:_Your_server_does_not_seem_to_fully_support_the_following_languages:

And I've taken the steps there to reconfigure locales. It doesn't seem to have any effect.

This was NOT an issue with the previous install (same server/hardware, Moodle 3.4), so it might be an issue with 3.7.

Any other insight on this issue?