I mean, I pronounce it differently in Spain than Blighty because, unless the serving staff speak Spanish they'd not know what you were talking about.

I had a friend who's boyfriend was proud of his Dutch ancestry so would always ask for Gouda at a deli or cheese counter as Hoarder. All he got was "yer, what?" and no cheese. He wouldn't compromise and my friend was embarrassed to go shopping with him.

Once went to a Chinese chippie and a guy I knew stepped up and said "don't worry, I know Cantonese" and banged out the order, presumably badly, and the guy beyond the counter replied, "sorry mate, I was born here" in a strong Scouse accent.

So yeah, it's not the Spanish pronunciation but you are going to make yourself look like a knob-end if you try saying it like that.