When I was installing EndeavourOS again, I saw that the installer tried to install firefox-i18n-pt. But there is no such package. There are only firefox-i18n-pt-br (for Brazilian Portuguese) and firefox-i18n-pt-pt (for Portuguese Portuguese).
Check the log below:
23:04:54 : static CalamaresUtils::ProcessResult CalamaresUtils::System::runCommand(CalamaresUtil>
… Target cmd: (“pacman”, “-S”, “–needed”, “–noconfirm”, “firefox-i18n-pt”) Exit code: 1 out>
error: target not found: firefox-i18n-pt
Minor issue, but I think it could be easily addressed.