All the Spanish I've learned from watching Spanish period dramas on Netflix
Spelled exactly as I hear it, for the enjoyment of you people who actually speak Spanish.
tienes razon (you're right)
adelante (come in)
habitacion (bedroom - this had to be the most commonly spoken word on Gran Hotel)
no se procupe (don't worry about it)
con su permisio (what you say when you're leaving a room - with your permission, or excuse me)
dejame (leave me alone)
te quiero (I love you - I don't think I have ever heard 'te amo')
This last one isn't a word, exactly, but an accent thing I noticed. A character from Argentina was on Las Chicas del Cables and he did a weird slurring thing with his double-Ls.