Comment 2 for bug 1933513

Same behaviour is observed inside the snap env:

$ snap run --shell openstackclients.openstack
To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.
$ env | grep LANG
LANG=en_US.UTF-8
$ openstack user show abaev --domain 40ea7f882ee24533ab357a4e7199698c
'ascii' codec can't encode characters in position 297-302: ordinal not in range(128)