What does it matter if you know it or not? If the situation arrises, and you know that you know enough words to make a point in Spanish, then by all means, say the damn words in Spanish. I work at my friend's dad's car cargo van rental place, in downtown Dallas - you want to know how many Mexicans I see in one business day? A lot. I don't know Spanish, but I know basic words and phrases. If I feel that saying one Spanish word will help the Mexican dude realize his Ace cash card is not accepted for renting a van, and his debit card has no money on it, and he has no insurance, then I'm going to say the damn word in Spanish.
I live in Dallas, and go to school in Lubbock.