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He is obviously from Slovakia. It says on their about page that their homebase is in Bratislava.

Are you assuming that nobody would be based in Bratislava who is not Slovakian?

Spoiler: you're wrong, the author is Canadian.

But what is his background? Canada is not a melting pot and many keep strong ties cultural backgrounds.

His name is pretty Anglo Saxon, he had a solidly well off Canadian childhood and he has previously lived in Russia, France, and Austria.