This study examines the unique sociolinguistic dynamics of Spanish in the United States, a nation projected to become the world's second-largest Spanish-speaking country by 2060. The demographic expansion of the Hispanic population is fundamentally reshaping the American linguistic landscape, positioning U.S. Spanish not merely as a product of language contact, but as a heritage language with its own systematic innovations. Despite extensive research on code-switching in private contexts like literature and social media, there has been a significant gap in the analysis of this phenomenon within formal discourse genres, such as interviews and public presentations. To address this bias, this paper analyzes code-switching data from the CORPEU(Corpus Oral de Referencia del Español de Estados Unidos) corpus, focusing on both semi-structured interviews and structured public discourse. By doing so, this research aims to overcome the existing discourse-genre bias in code-switching studies and to explore the essence of a vibrant language evolution on the North American continent.