My communication languages
By clicking on "Communication languages", you can determine your default settings concerning the languages in which you externally communicate about your events:

Tips:
Default backup language: the language used to send e-mails to an invitee whose language in the database is not one of the selected languages. You can still change the backup language per event.
If you deactivate a slider for a language here, you won't be able to select that language in your event communication. You can also leave all languages active here and decide per event which languages you want to use (see the Communication setup page).