25. A digital device for classifying at least two languages in an automatic dialogue system which processes digitized speech, comprising a digital processing arrangement including a speech recognizer and a language identification system, the digital processing arrangement being configured to recognize a language of the digitized speech input through logical evaluation of results of a speech recognition method carried out by the speech recognizer and a language identification method applied, by the language identification system, to the speech input, wherein the digital processing arrangement is configured such that the following steps can be fully carried out: a. if a valid speech recognition result has been obtained, the valid speech recognition result is retained for future dialogues; b. if a first attempt at recognition by a speech recognition method in a first language has failed, the language identification method has recognized a new language and if a second attempt at recognition by a speech recognition method in the new language recognized by the language identification method is successful, the language is automatically altered without queries; and c. if neither step a nor step b can be applied a multilingual escalation is used.
26. The device according to claim 25 , wherein the digital processing arrangement is configured such that if one language is discernible by a certain probability and a corresponding classification by the processing unit, a caller is asked whether a change of language is desired.