Disclosed are various embodiments for client-side internationalization of network pages. A network page and code that localizes the network page are obtained from a server. The code that localizes the network page is executed in a client and determines a locale associated with the client. One or more internationalized elements are identified in the network page. The internationalized elements are replaced with corresponding localized translations. The network page is rendered for display in the client after the network page has been localized.