Installer crushes while trying to install with language English & localization None

Distribution (run cat /etc/os-release): NAME="Pop!_OS" VERSION="19.10" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Pop!_OS 19.10" VERSION_ID="19.10" HOME_URL="https://system76.com/pop" SUPPORT_URL="http://support.system76.com" BUG_REPORT_URL="https://github.com/pop-os/pop/issues" PRIVACY_POLICY_URL="https://system76.com/privacy" VERSION_CODENAME=eoan UBUNTU_CODENAME=eoan LOGO=distributor-logo-pop-os

Related Application and/or Package Version (run apt policy $PACKAGE NAME):

Issue/Bug Description: When installing with pop-os_19.10_amd64_nvidia10.iso, if you choose to use English but then choose None as Localization, installation breaks. Trying to generate localization "en" which is not a valid one.

Steps to reproduce (if you know):

Start a clean install
Choose English (probably other languages will have the same problem) as language
Choose None as localization
Continue installation. At some point it will break

Expected behavior: Installation will break while trying to create localization "en_"

Other Notes:

pop-os / installer

Installer crushes while trying to install with language English & localization None #203