I suspect it has something to do with proximity to native speakers of the language, as France (effectively) borders the UK and Mexico borders the US.
And inconsistently so!
I've had jury duty several times, and nobody can agree on how to pronounce voir dire. Some courts say "vwahr deer" which is a decent approximation of the French pronunciation, and others say "vore dyer". And while I haven't heard it myself, I wouldn't be surprised if some people pronounce voir as "voyeur".
The use the public would be most familiar with is the interrogation of the jury pool, by both parties, to make sure they are suitable (e.g. suitably biased) jurors before trial:
And of course there is the famous "shedule" vs "skedule" pronunciation for schedule.
Are you saying people who don't pronounce their aches should use "a" and not "an"? Because that would sound weird trying to pronouce two vowels like that.
We have two main ways of saying words like "hotel". I (with a rather non-descript vaguely southern accent) pronounce the H in hotel, and so say "a hotel". Many people from London and the south east (especially Essex and the parts of the home counties that has a large influx of North Londoners) will generally drop their leading "H" and say "an 'otel".
There is a third accent which is a minority, the rather extreme upper class accent where they also drop a lot of their leading Hs, and therefore use "an". That's not "posh cockney", that's just "posh", a lot of them have always spoken like that. Even among the posh I'd rank that accent as relatively rare these days.
Id does all lead to the occasional argument among slightly dull people about whether you should write "an hotel" or "a hotel".
And I've never been able to figure out what the correct way to say "homage" is.
And that accent is almost never Spanish. It’s either Mexican, Cuban, or Puerto Rican. My Spanish accent is very much Chicano, because I grew up in such a neighborhood in Southern California. Castilian Spanish sounds effete to me, and of course I sound uneducated to someone from Madrid.
Also, these pronunciations are far more common in the coastal states than flyover country.
90% of the speech outside of the big towns/cities, the Castilles and maybe Cantabria will sound uneducated or 'hick' to a Madrileño. Specially Aragon, Murcia, Extremadura and the infamous Andalusia where even the Risitas guy can be extremely hard to understand to natives outside Andalusia.