German umlauts aren't displayed correctly for at least dotnet tool restore

Describe the bug

When having the following locale enabled on Windows: de-AT, German umlauts aren’t displayed correctly.

Wiederherzustellende Projekte werden ermittelt… Das Tool “microsoft.dnceng.secretmanager” (Version 1.1.0-beta.23219.2) wurde wiederhergestellt. Verf├╝gbare Befehle: secret-manager Das Tool “microsoft.dnceng.patgeneratortool” (Version 1.1.0-beta.22580.1) wurde wiederhergestellt. Verf├╝gbare Befehl e: pat-generator

To Reproduce

1. Set locale to de-AT and run an Arcade build: git clone https://github.com/dotnet/arcade && cd arcade && Build.cmd
2. Observe in the restore output that umlauts are displayed incorrectly.

FWIW this is the command that invokes the dotnet tool restore: https://github.com/dotnet/arcade/blob/main/src/Microsoft.DotNet.Arcade.Sdk/tools/Tools.proj#L55

Further technical details

• Include the output of dotnet --info

PS C:\git\arcade> dotnet --info
.NET SDK:
 Version:   8.0.100-preview.3.23178.7
 Commit:    e300b0e1e6

Laufzeitumgebung:
 OS Name:     Windows
 OS Version:  10.0.22621
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.100-preview.3.23178.7\

.NET workloads installed:
Es sind keine installierten Workloads zum Anzeigen vorhanden.

Host:
  Version:      8.0.0-preview.3.23174.8
  Architecture: x64
  Commit:       47bad717bd

.NET SDKs installed:
  7.0.105 [C:\Program Files\dotnet\sdk]
  7.0.300-preview.23179.2 [C:\Program Files\dotnet\sdk]
  8.0.100-preview.3.23178.7 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.0-preview.3.23177.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.0-preview.3.23174.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 6.0.15 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.16 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.0-preview.3.23178.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

[dsplaisted]

Is this still an issue with later previews? @nagilson fixed some encoding issues, for Preview 5 I think.

[ViktorHofer]

DOTNET_CLI_UI_LANGUAGE

Maybe setting this env var isn’t sufficient to repro the issue? I’m from Austria which is why my operating system language locale is “de-AT”. Just saying that this could be tied to the underlying operating system locale.