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Translation Delivery Network
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A Translation Delivery Network (TDN) or Foreign Content Delivery Network (FCDN) is a cloud network which delivers translations for websites. The goal of a TDN is to make websites multilingual without pushing website owners to install software on their servers. Most TDNs are operated as an application service provider (ASP) on the Internet (also known as on-demand software or software as a service). TDN nodes are usually deployed in multiple locations, often over multiple backbones. Benefits include reducing bandwidth costs, improving page load time, or increasing global availability of foreign content. Requests for content are typically algorithmically directed to nodes that are optimal in some way. When optimizing for performance, locations that are best for serving content to the user may be chosen. This may be measured by choosing locations that are the fewest hops, the fewest number of network seconds away from the requesting client, or the highest availability in terms of server performance (both current and historical), so as to optimize delivery across local networks. A TDN operator gets paid by website owners who want to make their website multilingual and available to the world. In turn, a TDN pays ISPs, carriers, and network operators for hosting its servers in their datacenters and also to translation agencies for translating the client website contents. TDNs usually use automatic machine translations to save translation costs. 
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