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master post]
Portions of the marketplace are covered. The vast majority of it isn't.
Given two days you could probably see everything, if you hurried. If you wanted to take your time... maybe a week.
Anything you're looking for, you can likely find. Like most of Santo, it's got its good parts -- its high-class parts -- and the parts that are not so good. People here speak all kinds of languages, though English and Mandarin are the two most frequently spoken. You probably shouldn't assume that everybody you meet will speak English. (Some of them will speak Basque.) One thing that holds true, no matter the section of the market you're in -- swirls of bright color, and crowds of people.