In general, I know how to enable spell checking in VS Code for different languages. However, I was not able so far to find a spell checker for the old German spelling rules (sometimes called 1901 rules).
To clarify, the following link shows such a dictionary for LibreOffice:
https://extensions.libreoffice.org/en/extensions/show/german-de-de-1901-old-spelling-dictionaries
I'd like to have such a dictionary in VS Code. Any idea where I can get it from?