1. A client apparatus communicable with a server apparatus via a network, the client apparatus comprising: a processor; and a memory storing instructions that, when executed by the processor, cause the client apparatus to: register shortcut buttons for displaying web pages, each button corresponding to at least a URL and a display language; display an operation screen including the registered shortcut buttons; detect a user operation for selecting one of the shortcut buttons in the displayed operation screen; and transmit to the server apparatus, in response to the detection of the user operation, a request for a web page based on a URL corresponding to the selected shortcut button, the request including a code of a display language corresponding to the selected shortcut button, to thereby receive the web page associated with the display language.
5. The client apparatus according to claim 1 , wherein the memory stores compatible language information indicative of display languages compatible with the client apparatus, wherein when instructed to register the shortcut button, the instructions further cause the client apparatus to display a registration screen on the operation screen, and wherein when the URL is input on the registration screen, the instructions are further configured to determine the display language according to the compatible language information.