I have reverted the commit mentioned by Carl and another text codec related commit for the Qt 5 builds. This will hopefully fix the broken umlauts in the progress messages.

This might be caused by https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpg4win-tools.git;a=commit;h=30b5736a97d884452c9ad8c713600326ee06a7c3

Thanks! please consider adding it to 2.2 and master as well. I suspect it's more outdated than it would be if it had been shipping in the upstream tarball.

Pretty outdated, but I add it nevertheless to 2.4
s/gnupg-2.4/po/nl.po: 1320 translated messages, 625 fuzzy translations, 268 untranslated messages.

Thanks for your work. I applied it to Gpgex.

Will do. Thank you very much.

Looks like
https://bugs.kde.org/buglist.cgi?component=it&product=i18n&resolution=---
is the bug tracker for Italian translations.

Setting the priority to low because that is the task for the KDE translation team. I am not sure how we can interact with the translation team, bug tracker wise. Do they have their own tracker?

Check https://community.kde.org/Get_Involved/translation for information how to contact the translators and/or become active in translation.

No regression, assuming things work.

Thanks. I'll apply your patch.

Well, this bug is fixed by using a decent libgpg-error or configure it correctly.

Good catch. The translation of the option descriptions is done as part of the option parser (libgpg-error/src/argparse.c) and thus we need to have gettext support over there. Also for some other error messages.

Seems to work if NLS support is enabled. Updating in https://github.com/Homebrew/homebrew-core/pull/122706. Once merged, users will need to brew reinstall libgpg-error (Homebrew has decided to avoid forcing updates to all users outside of critical fixes).

Probably due to libgpg-error being built without NLS support on macOS as formula currently doesn't have gettext dependency. On Linux, libintl is provided by glibc so doesn't need any extra dependencies.

This is the formula: https://github.com/Homebrew/homebrew-core/blob/c26f1c8714c231ee6796915f033ba229c89af3d6/Formula/gnupg.rb

I have no idea about Homebrew - can you figure out the maintainer and point him to here?

This is the Homebrew build. Maybe something not included in the recipe?

No idea what happens. I can't replicate that on a Linux box using GNU gettext and neither in Windows using gnupg's own gettext implementation. It seems that strings without any line feed don't get translated.

Thanks. Looks pretty standard. I will have a closer look.

gpgconf -L:

sysconfdir:/usr/local/etc/gnupg
bindir:/usr/local/Cellar/gnupg/2.4.0/bin
libexecdir:/usr/local/Cellar/gnupg/2.4.0/libexec
libdir:/usr/local/Cellar/gnupg/2.4.0/lib/gnupg
datadir:/usr/local/Cellar/gnupg/2.4.0/share/gnupg
localedir:/usr/local/Cellar/gnupg/2.4.0/share/locale
socketdir:/Users/emirsari/.gnupg
dirmngr-socket:/Users/emirsari/.gnupg/S.dirmngr
keyboxd-socket:/Users/emirsari/.gnupg/S.keyboxd
agent-ssh-socket:/Users/emirsari/.gnupg/S.gpg-agent.ssh
agent-extra-socket:/Users/emirsari/.gnupg/S.gpg-agent.extra
agent-browser-socket:/Users/emirsari/.gnupg/S.gpg-agent.browser
agent-socket:/Users/emirsari/.gnupg/S.gpg-agent
homedir:/Users/emirsari/.gnupg

Can you please provide the output of

It is unlikely that the tofu stuff will get into widespread use in the 2.2 version - if at all.

That seems to (mostly) work partially fix PowerShell pipeline output at least:

Hello again Werner,

Ok, but the problem is that by default CMD command windows do not use any Unicode set of characters, and their default font is 'Raster characters' and the typical display of characters inside these windows, at least for Italian people because this was the default since MS-DOS age, is to only consider using MS-DOS ASCII codepage 850, not Unicode.
And this is also why before showing the error message I ran the command mode.
Anyway because of the 2 characters getting displayed instead of single expected 'è' (whose character code is 0x82) I can also tell you that by using Charmap.exe again (just in case you may not know it allows display of any Unicode or Raster font characters and their hexadecimal codes) and so switching its default font from System (Unicode) to 8514oem (raster, corresponding to 8514oem.fon) I've been able to determine which should be the 2 wrong displayed characters hexadecimal codes : 'Ã' (0xC3), and '¨' (0xA8) but here obviously both characters cannot be represented correctly because this site is using 'Segoe UI' font, which is Unicode too.
So the only main way to check that I identified the correct characters will be if you (or someone else you know) with another Windows client run Charmap.exe switch font to 8514oem (raster) and check that displayed characters corresponding to 0xC3 and 0xA8 are the same that got displayed in the error message bitmap I provided (a part from probably being able to find where in Italian messages localization rather then in source code those 2 characters have been used incorrectly).
P.S. Because in a past similar bug about Italian localization I saw a comment from you about this kind of option, please just let me know in case you think I might possibly be able to help you to review involved 'GPG' Italian error message(s) for this bug.

That pretty much looks like the other errors you have with Unicode characters - which we can't replicate.