Rock en español (Spanish: Spanish-language rock) is a term used widely in the English-speaking world to refer any kind of rock music featuring Spanish vocals. Unlike English-speaking bands, very few acts reached worldwide success and often not even between different Spanish-speaking countries due to a lack of promotion. Despite rock en espagnol/'s origins in the late 1950s, many rock acts achieved at best nationwide fame until the Internet consolidated the listeners. However, some rock en español artists did become internationally popular with the help of a promotional campaign from the mid 1980s to the mid 1990s called "Rock en tu idioma" (Rock in your language). Some specific rock-based styles influenced by folkloric rhythms have also developed in these regions. Some of the more prominent styles are Latin rock, a fusion of rock music with Latin American and Caribbean folkloric sounds developed in Latino communities; Latin alternative, an alternative rock scene which blended a Latin sound with other genres like Caribbean ska, reggae, and soca; or Andalusian rock, a flamenco-influenced style that emerged in Spain.
Spanish-speaking rock music began in the late-1950s, through listening to performers like Elvis Presley, Buddy Holly and Bill Haley, who popularized rockabilly in the United States. The song "El relojito" by Gloria Ríos released in 1956 is often considered the blueprint of rock en español. In 1958, Ritchie Valens covered the Mexican folk song "La Bamba", popularizing Spanish-language rock music throughout Latin America. That year, Daniel Flores performed his hit song "Tequila", which reached nº1 in Billboard charts.