Couldnt you just buy the english version if a localized version is available? Just curious, its not a criticism.
No. On Origin ME3 was only available to me in Russian version (thanx the Maker, good people shared Int language pack with English subs and UI, and they did not change VO).
I also had a long chat with origin support before they agreed to change my russian-only DAA for the English one. A friend of mine was from Poland, but he chanced to be in Russia, and he was bound to Russian copy of ME3.
So, no, in some cases English copies are not even available. Which is worse - Origin defines your location by current IP. You could always use some sort of proxifier or anonymizer, of course, but that's not entirely legal ( I think).