Not to mention that in my experience pretty much no program offers "English, intl." option. I've done sales/customer support in English and have been commended for my English by native Brits. Still I do have an accent and voice commands are very much more (almost completely) miss than hit.
Now, when voice commands support my native Finnish I'll be seriously impressed, what with all the regional accents and spoken language being rather different from the written form. Not seeing that happening any time soon though.