Hi,
If you would like, you can request to become an editor of the German translation.
You can make the request and that request can be approved by the WordPress German editors.
https://make.www.ads-software.com/polyglots/handbook/rosetta/roles-and-capabilities/pte-request/#pte-request-by-a-translator
What you can do to use it locally right now is go to the translate page: https://translate.www.ads-software.com/projects/wp-plugins/woo-address-book/stable/de/default/
At the bottom by the Export link, select “Only matching the filter” and “Machine Object Message Catalog (.mo)” and then click Export to download the .mo file.
Then save this .mo file to your WordPress site at wp-content/languages/plugins/woo-address-book-de_DE.mo
That will let you use it before it is approved on translate.www.ads-software.com