(Known issue) While running dev server, the locale switcher doesn't work. 

Due to limitations with Docusaurus, it's not possible to start the docs dev server with all languages. Leading to a broken language switcher. 

To work with another language, e.G German, the start command must be run with:
'pnpm start --locale de'

See: https://github.com/facebook/docusaurus/issues/7377