Information-Centric Networking (ICN) changes the network communication mode from host-centric to information-centric, which directly identifies content in a unified manner and conducts positioning, routing and transmission based on content. In-network caching is used to speed up content distribution and build the network into an integrated platform for information transmission, storage and service. ICN is regarded as one of the most promising next generation internet architectures. Because of in-network caching strategy of ICN, English corpus content is cached by ICN router, so as to perform real-time English translation. Therefore, this study proposes a caching strategy based on English corpus content popularity. Compared with the existing caching strategy, the experimental results demonstrate that the proposed strategy can improve lagging probability, latency and accuracy in real-time English translation. The real-time English translation is performed through the English corpus content, and the router caches the corpus content. After user request routing in the process of translation, if the related translation content hit the cache en-route, it will respond directly instead of obtaining the corpus from the server every time. Through nearby services, the transmission efficiency of corpus content is improved, and fast response and real-time translation are achieved.