Movies from the US and Spanish language.

[Nightlord]

Hello! I'm new to the forums and have a question that I hope you can help me with.

I am a Spanish living in Japan, and since Europe and Japan have different systems (PAL and NTSC respectively) there is no way for me to view movies in Spanish here. My only option is buying US versions of the movies (since the US and Japan share both region code and system). But my dilemma is if the Spanish language version found in the US version of Harry Potter (and other movies as well) is the Spanish spoken in Spain or the Spanish spoken in South America (probably Mexico).

I hope someone can help me.

Thank you in advance!