A computer-implemented method for providing a definition or a translation is disclosed according to an aspect of the subject technology. The method comprises receiving an input indicating a word selected by a user, sending a definition request for the word to a definition server, receiving a response to the definition request from the definition server, sending a translation request for the word to a translation server, and receiving a response to the translation request from the translation server. The method also comprises determining whether to provide the user with a definition or a translation of the word based on the responses from the definition server and the translation server, and providing the user with the definition or the translation of the word based on the determination.