This plugin allows users to subscribe to pads and receive email updates when a pad is being modified. You can modify the frequency. This plugin is still in early stage and has things TODO (See TODO).
Open that pad in ANOTHER BROWSER then begin modifying, you should receive an email when the pad has begun editing and once the pad has gone stale (when everyone stops editing it and a time period passes).
NOTE: You will NOT receive an email if you(the author that registered their email) are currently on or editing that pad!
In case you would like to have it in another language, you can easily translate the few sentences and then contact us on irc (#etherpad-lite-dev on irc.freenode.net) or create a Pull-Request on the GitHub repository.
You can find the sentences to translate in the ep_email_notifications/locales/ directory.