Spanish Audio track in LOST Season 1 & 2

[danoliverm]

Hello there,

I am interested in getting the LOST seasons 1 and 2 since it's region free and it won't be released here in Spain until nearly november, and although I prefer the original audio track, my family is lost-addicted and non-english speakers, so I'd like to know wether the spanish track included in the edition is neutral spanish (american) or Castillian, the spanish spoken in here.

I'd be really thankful if you helped me in this matter.

Thanks so much in advance.