conjugation of vos" (e.g. tú ) is widespread. On the other hand, "pronominal voseo", the use of the pronoun vos—pronounced with aspiration of the final —is used derisively in informal speech between close friends as playful banter (usually among men) or, depending on the tone of voice, as an offensive comment. In Colombia, the choice of second person singular varies with location. In most of inland Colombia (especially the Andean region), usted is the pronoun of choice for all situations, even in speaking between friends or family; but in large cities (especially Bogotá), the use of tú is becoming more accepted in informal situations, especially between young interlocutors of opposite sexes and among young women. In Valle del Cauca (Cali), Antioquia (Medellín) and the Pacific coast, the pronouns used are vos and usted. On the Caribbean coast (mainly Barranquilla and Cartagena), tú is used for practically all informal situations and many formal situations as well, usted being reserved for the most formal environments. A peculiarity occurs in the Altiplano Cundiboyacense and among some speakers in Bogotá: usted is replaced by for formal situations (it is relatively easy to identify a Boyacense by his/her use of this pronoun). Sumercé comes from su merced ('your mercy'). In parts of Spain, a child used to use not tú but usted to address a parent. Today, however, this usage is unusual. Among the factors for the ongoing replacement of usted by tú are the new social relevance of youth and the reduction of social differences. In particular, it has been attributed to the egalitarianism of the right-wing Falange party. By contrast, Spanish leftists of the early 20th century would address their comrades as usted as a show of respect and workers' dignity. According to Joan Coromines, by the 16th century, the use of vos (as a second person singular pronoun) had been reduced to rural areas of Spain, which were a source of many emigrants to the New World, and so vos became the unmarked form in many areas of Latin America. A slightly different explanation is that in Spain, even if vos (as a singular) originally denoted the high social status of those who were addressed as such (monarchs, nobility, etc.), the people never used the pronoun themselves since there were few or no people above them in society. Those who used vos were people of the lower classes and peasants. When the