Problems occur right now if older threads link to the old German help pages, like e.g. (my) post:
The original link intended to open the syntax reference for regular expressions which was formerly situated in the description of the action "Replace with regular expression".
https://docs.mp3tag.de/actions/replace-regexp/?de
This is now mapped to
https://docs.mp3tag.de/actions/#regexp
but it does not jump to the bookmark on that page and also, it does not show the regular expression which is now in a separate chapter:
https://docs.mp3tag.de/regex/
(which I think is better to have the regular expression syntax in 1 place as it can be used in the context of actions, scripting and filtering)
Yet, the old link is not correct any more.