You haven't seen them because they have already been burned by stupid systems that will not take non-ASCII characters so they don't even try, the most common Spanish/Portuguese first name is José but I doubt you'll find a José at your job.
Sure, but then that's a very loose meaning of "requires" unicode support if all the people who "require" it probably aren't even going to try to use it even if you support it.
Ironically, isn't part of the issue that most "engineered" keyboards in the US don't have any innate way to type those, and thus require your "programmed" OS or application to have the support needed to even type those characters with some chord of keys?
