15. The apparatus as claimed in claim 13 , wherein the storage unit is configured to pre-store a dialogue history in which the language of the segment of the voice input signal and the name of the country co-exist, and the controller is configured to determine that the language of the segment of the voice input signal is a language for the name of the country, when the dialogue history includes the language of the segment of the voice input signal and the name of the country.
13. The apparatus as claimed in claim 12 , wherein the context information comprises at least one of: whether a name of a country exists within the voice input signal; information on a place where an apparatus for recognizing the voice input signal is located; dialogue history information; and an updated non-primary language database.