Many thanks for your article @Sarah. In between, we created a new form on the project website to add local events to the list. It is easier to access than the Google Sheet. It would be great if you can update the link to this: https://wptranslationday.org/add-local-events/ and we published a guide page how to organize a local event as translation sprint on the Polyglots handbook.

Kind regards,
Birgit