there! I'm trying to do a translation for a client's

Hi there!

I'm trying to do a translation for a client's website. There is language file coming with the plugin, but there are quite a few things missing.
Looks like I cant access certain strings, for example:

Service name:
Date and time:
Lasts (approx):

The calendar displays english day names only (Mo, Tu, We etc.)

I work with the german version of WordPress, the day and time formats a set correctly.

I would very much appreciate your help.

Regards,

Kirsten