Seat Reservation Played through

Wow, it is literally amazing, as people say this is the best and this is for free, amazing. Kudos to the creator.

Couple of things to note, though:
1. Is there a German translation it seems like there is but I can’t seem to activate it. Please Help?
2. Is it normal that everybody can view the custom fields that is not good, since this is personal data shared to other users not good => Is there a setting I am missing?
3. Is there an option to add a SMTP Mailer because Mails are not delivered reliably => Any plugin recommendations or settings that I am missing?