Zeitreise Translation Issue

Dear Ellen, I love your WP Zeitreise theme! I am wondering why the terms “Edit” and “Filed under” on the front-end (when logged in as admin) are not translated to German despite the translation files are available in my child theme folder and the term is properly translated? Is this a bug or do I oversee something? By the way, I am using the latest theme version. Thank you for your assistance, Matthias.