German translation missing

Hi.
I just noticed after installing your plugin that it seems to be only partially translated to German. I have installed it a few times before on other sites, that’s why I noticed the difference.

For example: The preset “Contact form 1” usually comes as “Kontaktformular 1”. The notification texts seem to be translated halfways (“Thank you for your message. It has been sent.” but “Das Datumsformat ist ungültig.” <- “invalid date format”).

I am absolutely not sure why that is, maybe it’s not even anything you can help, but I wanted to let you know 🙂

Keep up the great work!

Regards
Floutsch

https://wordpress.org/plugins/contact-form-7/