Is best asked of Apple. Ask them.
I am English and live in Spain. If I register with itunes using my Spanish card it forces me to use the Spanish itunes site and offers me content in Spanish.
I want to use the UK site but it won't let me register with my Spanish credit card.
I have got round it by using my mother's UK credit card but I would much rather use my own Spanish card.
Does anyone know how I can register from Spain with a Spanish card but use the UK itunes site?