Topic on Talk:Workout Fanservice
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Two caveats: first, I'm only familiar with Canadian copyright law and am not an expert in it; second, free legal advice is worth what one pays for it.
It looks to me that we're venturing into the area of "derivative works" here, in much the same way that a translation of a work into another language is a derivative work. I think there's nothing wrong per se with derivative works (I write fanfic), but copyright law disagrees with me.
It's been a while since I've gone and looked at what license if any TVTropes content is available under. Might we possibly be allowed to create a derivative work from one or more of their pages?