The word "cucaracha" is the Spanish word for cockroach, and "la" is the feminine definite article, meaning "the."
While "cucaracha" can be used to refer to a specific cockroach, it's often used more generally, like "the cockroach" in English, referring to the insect species.
The famous Mexican folk song "La Cucaracha" does not literally mean "little cockroach" either. It's a satirical song that has multiple interpretations, but it mainly uses the cockroach as a symbol of something that is resilient and persistent, even in the face of adversity.