How to Say "frontrunner" in Spanish
The Spanish word for “frontrunner” is “líder” — B1 level. This is a very common word in everyday Spanish.

Examples
El presidente es el líder del país.
The president is the leader of the country.
Ella es la líder del equipo y toma todas las decisiones importantes.
She is the team leader and makes all the important decisions.
Este producto se ha convertido en el líder del mercado en solo un año.
This product has become the market leader in only one year.
Gender and Articles
Even though 'líder' ends in 'r', it works for both men and women. You use 'el' for a man ('el líder') and 'la' for a woman ('la líder'). The noun itself always stays the same.
Using an Adjective Form
Mistake: “Using 'lideresa' for a female leader.”
Correction: While 'lideresa' exists in some regions and contexts (like political parties), 'líder' is the standard, safe, and universally accepted term for women. Stick to 'la líder'.
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