Why is el salvador a spanish-speaking country?

El Salvador is a Spanish-speaking country because it was a colony of Spain for over 300 years. During this time, the Spanish language was introduced to the region and eventually became the dominant language. Even after El Salvador gained independence from Spain in 1821, Spanish remained the official language of the country. Additionally, the vast majority of El Salvador's population (around 90%) is of Spanish descent, further contributing to the dominance of the Spanish language in the country.