Few travelers think to ask about the local tipping customs until that first bill lands on the table, so finance site Mint breaks down various countries' customs in delightful map form. Most of Europe tips 10 to 15 percent, while restaurants in Brazil typically tack on a 10 percent service charge instead. In China, tipping isn't customary at all, while Australians have begun leaving tips over the past two decades.
Some countries have different expectations of tourists than of locals. Oh, and for the most part, servers appreciate their local currency.