Castellano. (Pron: Cas-tah-jzha-no. emphasis on the j sound, as in the word ‘edge‘) A pseudo dialect of Spanish, as in it’s not really a recognized dialect. Shhhhh don’t tell the argentines that, they get rather upset. Castellano should not be confused with Lunfardo nor Castillian Spanish. They’re not the same things. Castellano is the version of Spanish that is spoken in Argentina and really Buenos Aires. Castillian Spanish is only spoken in the mountain region of Spain, very different pronunciations and a few different words. Lunfardo, on the other hand, is the street language of Buenos Aires. You’ll also hear a good portion of Lunfardo in the lyrics to Tango music itself.