ubuntu upgrade from lunar to mantic changes language to some language i don't understand

[Alexander Vinbæk Strand]

I'm upgrading to Ubuntu 23.10 then the text changes from Norwegian bokmål to greek letters

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: ubuntu-desktop 1.501
ProcVersionSignature: Ubuntu 6.2.0-27.28-generic 6.2.15
Uname: Linux 6.2.0-27-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.27.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 25 21:07:26 2023
InstallationDate: Installed on 2023-03-05 (173 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
SourcePackage: ubuntu-meta
UpgradeStatus: Upgraded to mantic on 2023-08-25 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Henning Kulander (hennikul)]

Tried upgrading two computers from 23.04 to 23.10. This happened on both machines.

[Jeremy Bícha (jbicha)]

We believe this issue is fixed now. I did an upgrade from 23.04 to 23.10 yesterday and the fonts remained readable.

I am marking this a duplicate of the master bug for this issue.