Hola Brasil!
How do you spell / pronounce "iPad" in Portuguese?
Wrong language! “Hola” does mean “Hello”, yes, but in spanish (or, if you want to be accurate, castillian)… The universal portuguese form (both in Portugal and Brazil – the name of which, funnily enough, you spelled right) would be “Olá”, and the most popular form in Brazil would be its shortened version “Oi” (akin to “Hey”).
As far as the spelling is concerned, there is obviously no variation whatsoever when it comes to trademarks, AFAIK, in any country in the world, even in those in which different alphabets are used [edit: actually, AirPort was called AirMac in Japan; I’m not sure whether that was for legal or cultural reasons, but now that I think of it, that approach could have been and still be a possible solution for the itv network vs. Apple iTV conundrum]…
As for the pronounciation, I'm not sure how it is in Brazil, but here in Portugal it is either exactly like in english (we have a tendency to imitate the american english accent quite well, albeit sometimes with mixed results like with Nike, which we pronounciate similarly to the word “like”, or Adobe, which vowels we pronounciate somewhat like "abode"), or alternatively just with the english form of i (as in “eye”) combined with an open a (as in “far”). If I had to guess, in Brazil probably the most common form is the latter, whereas in Portugal it is definitely the former. [edit: bluesoverdrive beat me to it, and now that I think of it, that “iPadee” (or “iPadjee”) pronounciation is probably more accurate than the one I alluded to

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I know this is an exceedingly technical answer to an innocent attempt at being nice/funny, and it may make me come across as being too serious; don’t be fooled, I do (as most portuguese and brazillian) have a sense of humour, but when it comes to confusing or mistaking spanish (or Spain, or spanish-speaking Latin American countries) with portuguese (or Portugal, or Brazil), we usually get really irked. Portuguese is, all things said and done, the 4th most spoken language in the world, behind only english, chinese and spanish (I'm not exactly sure if they are in the right order, though).
On that subject, Whitney Houston greeted the crowd present at her gig during Expo’98 in Lisbon (a World Exhibition… I mean, how hard is it for an artist to actually know where he/she is under those circumstances?) with a resounding “Good night Spain!”; she was promptly booed by the audience for the rest of the evening.

[edit: actually, I’m having trouble finding sources for this, so it may very well be an urban legend, but it is something that does happen on occasion

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