1. A method of switching a user from one original dialog system ( 1 ), which communicates with the user using a speech recognition and/or speech output unit ( 6 ) to a target dialog system ( 2 ) which communicates with the user using a speech recognition and/or speech output unit ( 7 ) which can be set as desired to one of several languages, characterized in that, during switching, a language information parameter (P 2 ) is sent to the target dialog system ( 2 ), which language information parameter represents a language in which the communication between the user and the original dialog system ( 1 ) has taken place, and, using this language information parameter, the speech recognition and/or speech output unit ( 7 ) of the target dialog system ( 2 ) is automatically set to a suitable language for communication with the user.