The Music Collection has CDs of music from all around the world, including the many musical traditions of Latin America. You can find music in CardCat or by using the Libraries' Mediafinder for World Music or the Media Finder for Musical Recordings (Other than Classical).
The World Music media finder allows you to search for folk and traditional styles by region, country, or language, and you can add a keyword for more specific searches. The other-than-classical Media Finder searches popular music styles by genre, decade, and country. One choice there is "Latin Pop," and you can further refine by country.