In this specific case I think it’s more of a western thing. Most people in Asia outside of Japan would pronounce the “ze” in Reze as “zeh”, while Americans for example default to “zey”, pronounced like “okay” or “today”; so they say “Rey-Zey”. If you ask me or anyone from my home country to say it the way it’s spelled, we’ll say it as “Reh-zeh” and even roll the “r” exactly like how it’s pronounced in Japanese. We read the letter e as “eh” and not “ey”.

But that’s not even too bad. The worst ones I’ve heard are “Reez”, “Rez”, and “Ray-zuh”. lmao. And that’s after hearing it being said in the movie.