Board Thread:Support Requests - Getting Technical/@comment-46360641-20200822182615/@comment-25014407-20200823233203

Basically if you directly copy from other wikis, always provide proper attribution that can be publically seen (either as reference or edit summary should be good enough). If you don't do that, it is copyright infringement, but depending on the case, staff might turn a blind eye, for example if it is preparation for an interlanguage link. That is also valid of derivative work (changing only 1 or 2 words in a long text).

If you directly copy from other sources (word-for-word), public source attribution is often better, but it's not a save-all; sometimes a license is still required, which is often the case for lyrics or transcripts. I doubt if the content you copy over is only one or two sentences (and the original source is aware of it!), the publisher would report the content and/or the wiki for infringement (still possible though), but chances are higher if there is more content that is plagiarized. I dare to say that images are more susceptible to copyright infringement (since these are often used without the original purpose), but that doesn't mean that text is always safe.

As Andrew said, there are too many small details for us and for most staff members to know the full ins and outs of copyright, and if you're in doubt, you could contact staff (not sure if they would relay it to specialized people though) or the original publisher (to check if it's allowed), or write your own version based on your sources.