I could reproduce it. The old installer makes use of the time zone location to "guess" the desired locale, but that is apparently not the case with the flutter based installer (at least not for the English variants).
There is a similar issue reported at GitHub: https://github.com/canonical/ubuntu-desktop-installer/issues/2386 ** Bug watch added: github.com/canonical/ubuntu-desktop-installer/issues #2386 https://github.com/canonical/ubuntu-desktop-installer/issues/2386 ** Summary changed: - 24.04 install (UK keyboard) is showing United States in 'Your Account' section of control center when keyboard is UK. + 24.04 install with a British timezone location sets en_US.UTF-8 locale ** Package changed: gnome-control-center (Ubuntu) => ubuntu-desktop- installer ** Changed in: ubuntu-desktop-installer Importance: Undecided => High ** Changed in: ubuntu-desktop-installer Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/2043609 Title: 24.04 install with a British timezone location sets en_US.UTF-8 locale Status in ubuntu-desktop-installer: Confirmed Bug description: 24.04 install (UK keyboard) is showing United States in 'Your Account' section of control center when keyboard is UK. See screenshot. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: gnome-control-center 1:45.0-1ubuntu3 ProcVersionSignature: Ubuntu 6.5.0-9.9-generic 6.5.3 Uname: Linux 6.5.0-9-generic x86_64 ApportVersion: 2.27.0-0ubuntu6 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Nov 15 18:17:48 2023 InstallationDate: Installed on 2023-11-15 (0 days ago) InstallationMedia: Ubuntu 24.04 "Noble Numbat" - Daily amd64 (20231115.1) ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-desktop-installer/+bug/2043609/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp