Message localization

[PetSerAl]

Does this host respect DOTNET_CLI_UI_LANGUAGE anywhere?
https://github.com/dotnet/roslyn/tree/main/src/Workspaces/Core/MSBuild.BuildHost

I have an issue where messages not properly localized (it use OS language instead of configured language) in VS Code. I can track it to this assembly shipped with ms-dotnettools.csharp VS Code extension. I wrote custom MSBuild task, and it seems CurrentUICulture is not properly set, when task executed from this host.

[333fred]

@jasonmalinowski or @dibarbet would know.

[dibarbet]

Looks like we don't - https://github.com/dotnet/roslyn/blob/main/src/Workspaces/Core/MSBuild/MSBuild/BuildHostProcessManager.cs#L158

Filed #74902

There is an open question though of whether we should respect the DOTNET_CLI_UI_LANGUAGE or the VSCode's configured language.