In our research we have found that the Pronouns of address in Costa Rican Spanish are in a constant struggle between standardization and linguistic change, as well as between the norm and variation. For example, in chapter 1 of the thesis, regarding the diachronic approach, we can conclude that the pronoun usted has always been linked to an explanatory and descriptive analysis in Costa Rican Spanish. The studies point out that there is objectivity and neutrality when analyzing the functional and structural categorization of the pronoun. Meanwhile, vos and tú have been the object of a struggle between the prescriptive and the descriptive. In relation to chapter 2, regarding the chapter on attitudes, perceptions and linguistic evaluations concerning the Pronouns of address in Costa Rican Spanish, informants assign different positive evaluations to usted. Respondents focus mostly on clarifying how they use usted to mark positioning and acts of identity. On the other hand, for the same informants, different stereotypes continue to circulate around vos and tú. In the following chapters (3 and 4), in terms of the written language, newspapers as mass media are opting more for tú as part of the use of a standardized modality. On the other hand, in the spoken language, in terms of oral advertising both on television and radio, Costa Rica is following its own linguistic norm. The vos above all and the usted in a certain way are the instruments of expression of the mass media. Likewise, outside the advertising space, tú is the normative pronoun in electronic writing (chapter 5). In summary, there are different statuses of pronouns because the rules are different. For example, at the diacritical and perceptual level usted is the point of reference in usage. While in oral advertising it is vos and in written advertising and electronic writing it is tú. From this perspective, we can confirm, once again, the complexity concerning the Pronouns of address in Costa Rican Spanish, since it moves between different regulations depending on the register.