Product Advertising API hosts multiple locales so that developers around the world can take advantage of Amazon's multi-language support. Each locale uses the language, customs, and formats, such as date, time, and money formats, particular to that locale. You can see how this plays out by viewing the homepages for Amazon's different locales:
Canada—www.amazon.ca
Germany—www.amazon.de
France—www.amazon.fr
Japan—www.amazon.co.jp
UK—www.amazon.co.uk
US—www.amazon.com
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