Translation of congelado

for a minute I blamed the burger that I had eaten at the duty free back in Cancun, but thinking a little further I recalled eating street food the night earlier, as it was Mexican independence day.
Nevertheless I think that we need to communicate. All in all, we will learn a lot from each other, mostly by writing, but speaking exercises are also really good for your Spanish skills. Is this OK?
We booked a tour for the next two days, one on a boat and the other on foot. In one of the agencies we met a nice couple and decided to stay in touch with them and have dinner together.