Examples please. I know what fonts are, but encodings are less clear. Do you mean code pages?
Getting very deep, that might refer to Comparison of Unicode encodings, but how do you control?
What exact OS is this? It must be a Windows of some sort, but what is the duplicati you typed?
This looks like you eventually get to Duplicati.CommandLine.exe. Below is a PowerShell example.
PS C:\Program Files\Duplicati 2> .\Duplicati.CommandLine.exe
See duplicati.commandline.exe help <topic> for more information.
General: example, changelog
Commands: backup, find, restore, delete, compact, test, compare, purge,
vacuum
Repair: repair, affected, list-broken-files, purge-broken-files
Debug: debug, logging, create-report, test-filters, system-info, send-mail
Targets: aftp, azure, b2, box, cloudfiles, dropbox, file, ftp, googledrive,
gcs, hubic, jottacloud, mega, msgroup, onedrivev2, sharepoint, openstack,
rclone, s3, od4b, mssp, sia, ssh, tahoe, tardigrade, cos, webdav
Modules: aes, gpg, zip, 7z, console-password-input, mssql-options,
hyperv-options, http-options, sendhttp, sendmail, runscript, sendxmpp,
check-mono-ssl
Formats: date, time, size, encryption, compression
Advanced: mail, advanced, returncodes, filter, filter-groups, <option>
http://www.duplicati.com/ Version: - 2.0.6.3_beta_2021-06-17
PS C:\Program Files\Duplicati 2> chcp
Active code page: 437
PS C:\Program Files\Duplicati 2> chcp 65001
Active code page: 65001
PS C:\Program Files\Duplicati 2> .\Duplicati.CommandLine.exe
See duplicati.commandline.exe help <topic> for more information.
General: example, changelog
Commands: backup, find, restore, delete, compact, test, compare, purge,
vacuum
Repair: repair, affected, list-broken-files, purge-broken-files
Debug: debug, logging, create-report, test-filters, system-info, send-mail
Targets: aftp, azure, b2, box, cloudfiles, dropbox, file, ftp, googledrive,
gcs, hubic, jottacloud, mega, msgroup, onedrivev2, sharepoint, openstack,
rclone, s3, od4b, mssp, sia, ssh, tahoe, tardigrade, cos, webdav
Modules: aes, gpg, zip, 7z, console-password-input, mssql-options,
hyperv-options, http-options, sendhttp, sendmail, runscript, sendxmpp,
check-mono-ssl
Formats: date, time, size, encryption, compression
Advanced: mail, advanced, returncodes, filter, filter-groups, <option>
http://www.duplicati.com/ Version: - 2.0.6.3_beta_2021-06-17
PS C:\Program Files\Duplicati 2>
Folder names w/ “Umlaute”: GUI accepts, command line not talks about code pages and fonts a little.
If you can’t get the standard PowerShell to do what you want, you can try the new Windows Terminal.
For me, this has PowerShell with Cascadia Mono font. The standard PowerShell has Lucida Console.