The double-L is pronounced like the later Y, and the I is pronounced like the letter E. Tor-Tea-Yas.
You are saying that is the correct way to say it? That is how I say it and I hear UK chefs on TV pronouncing it that way. I don't know anyone here who pronounces it any differently.
'Tacos', I'm used to pronouncing with a short a (as in 'cap'), which is how definitely how it is pronounced in Spanish.
May move this to a new thread....