I tested this using Steve's more minimal test case from #ubuntu-release (https://irclogs.ubuntu.com/2021/09/14/%23ubuntu-release.html#t16:25) and did not receive a crash with the version of ubuntu-drivers-common from -proposed.
Setting up ubuntu-drivers-common (1:0.8.6.3~0.18.04.2) ... Processing triggers for libc-bin (2.27-3ubuntu1.4) ... (bionic-amd64)root@impulse:/home/bdmurray/# LANG=pl_PL.UTF-8 ubuntu-drivers autoinstall WARNING:root:_pkg_get_support nvidia-driver-390: package has invalid Support Legacyheader, cannot determine support level Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943614 Title: ubuntu-drivers crashes in python3-click when ubiquity runs the Polish language (locale) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1943614/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs