An electronic device includes a controller and a communication device. The controller acquires data indicating first text in a first language. The controller determines whether or not a secret character string is included in the first text. Upon determining that the secret character string is included in the first text, the controller converts the secret character string into a mask character string. The mask character string is for hiding the secret character string. The controller transmits data indicating first text including the mask character string to a translation server through the communication device. The translation server translates the first text into second text in a second language. When the communication device receives data indicating the second text, the controller searches the second text for a translated mask character string. The controller converts the mask character string in the second language into a secret character string in the second language.