Those file names are standard German language translation file names for the German WordPress language version. The language translation files for WordPress are stored/located in this folder WordPress folder: /wp-content/languages/.
Most likely scenarios: WordPress was updated/upgraded to WordPress 4.0 or the new German WordPress language translation files were manually uploaded/added to the /wp-content/languages/ folder.
If you do not want AutoRestore/Quarantine to check the /wp-content/languages/ folder then you can create an AutoRestore/Quarantine folder exclude rule for this folder. See this video tutorial for how to do that: http://forum.ait-pro.com/video-tutorials/#autorestore-quarantine
Any time files are sent to Quarantine and you are not sure if they are legitimate files or hacker files you would use the View Files option to view the contents of the file. If after viewing the contents of the file you are not sure if the contents of the file are legitimate or hacker’s code then you can send those files to info at ait-pro dot com and ask us to check them for you.