Earlier quoted context omitted.
Edit: It was judged as copyright infringement: https://en.wikipedia.org/wiki/Tanya_Grotter A wizardry school for preteens isn’t on its own particularly unusual. But the question becomes how similar would the works be if the original was never published. You aren’t in the clear of a few paragraph book summery would apply equally well to both works. Barring the normal exceptions, Spaceballs is making reference to other…
That Russian book series is a direct knock-off. Even the font looks similar. It’s also not a copyright violation because the question of how similar it is to the idea of Harry Potter is irrelevant with regards to copyright. If it was too similar and it was actively confusing consumers then it would be an issue of trademark. By making the protagonist a girl without glasses it does enough to differentiate itself that n…
“Despite its reputation in Russia and the many books it has spawned, the series is not available in English translation, because of the first book having been judged a breach of copyright.” https://en.wikipedia.org/wiki/Tanya_Grotter
So, respectfully you are simply mistaken.