There is nothing wrong with this source at all. In fact, I asked several admins/arbs on pl.wp about the reliability of culture.pl and they said it is an extremely highly reliable source. 

 In fact, FPaS, this proves that it is a reliable source. It is used as a source in over 350 articles here on English Wikipedia. And it's used in over 200 articles on Polish Wikipedia.

So the challenge for you here FPaS is this. Go and remove usage of culture.pl articles entirely here on English Wikipedia and Polish Wikipedia, and then come back and talk....

Then we can discuss this; where it is clearly called Rio de Świebodzineiro by scholarly sources. 

Josve05a, don't be fooled or intimidated here, the sources are clearly good, the monicker is clearly understood in Poland (I asked