Windows Installer: multiple languages, correct installer name

[tobiasKaminsky]

• Use /d "description" to have better file name in UAC within Windows installer client-building#98
• support more languages on Windows installer
  • https://www.add-in-express.com/docs/wix-multi-language-setup.php

[splitt3r]

Related to #3735

[rakekniven]

For the records:

https://help.nextcloud.com/t/nextcloud-client-setup-auf-deutsch/221324

@Rello Portuguese translators was asking for this on Transifex as well.

Any schedule to get installer localiued?

[nilsding]

I've somehow managed to create a multilingual MSI installer -- still need to commit the changes. The translations for most of the installer come from the installation framework (WiX) itself.

for testing I built it locally with only with the English, German, Czech, and French languages; it falls back to English when the MSI doesn't contain the translation:

Screencast_20250402_121134.webm

There are still some strings from our side that need to be translated though, e.g:

desktop/admin/win/msi/Nextcloud.wxs

Lines 219 to 220 in 9ae6c4b

	<Feature Id="ShellExtensions" Title="Integration for Windows Explorer"
	Description="This feature requires a reboot." >

visible here:

As a first step I would like to try to get the base translations integrated with our build system -- translating those strings (and hopefully integrating them into Transifex) will be a follow-up task.