Black Panther was Jewish American wild fiction about Africa based on generally nothing, it's just creative.
The Witcher is Polish fiction about Europe based mostly about Western European mythologies and histories (only marginally Eastern European, especially after the first short stories, contrary to the popular meme), also some blatant plagiarism from a relatively obscure English fantasy author named Moorcock who doesn't care about it.
Black Panther was Jewish American wild fiction about Africa based on generally nothing, it's just creative.
The Witcher is Polish fiction about Europe based mostly about Western European mythologies and histories (only marginally Eastern European, especially after the first short stories, contrary to the popular meme), also some blatant plagiarism from a relatively obscure English fantasy author named Moorcock who doesn't care about it.