Normally, your booking links will be displayed in the language of the visitor's browser. If you want to forcibly show the booking link in other languages, adjust your link by adding the language code (see below for supported languages) behind www.demodesk.com or by adding a query parameter at the end.
Original booking link:
German version – option 1:
German version – option 2:
In your embedded link, replace the "+r+" with the language code just like above or add the query parameter &lang= to the link.