IntelliSense defaults to system language

[slarticodefast]

Coming here from dotnet/vscode-csharp#2513
Not sure if this is the right place or if there is an open issue for this already.

I'm using the C# extension by muhammad-sammy for VSCodium, which uses omnisharp.
When hovering over a warning or error, IntelliSense will localize it into the language chosen for the operating system. According to the linked issue this is a long existing bug, which is hugely problematic for international programmers, as looking up error messages in languages other than english will often yield no results.
Ideally it should default to the IDE's language setting or have a custom one instead.

The issue was closed with the comment "O# does not set the CurrentUICulture so it defaults to your system locale. If this is still a problem, please open an issue at https://github.com/OmniSharp/omnisharp-roslyn/issues".

A workaround for this issue is to delete some .dll files in this folder, but this has to be repeated with every update.