pedant
US /ˈped.ənt/
UK /ˈped.ənt/

1.
pedante, quisquilloso
a person who is excessively concerned with minor details and rules or with displaying academic learning
:
•
He's such a pedant, always correcting everyone's grammar.
Es un pedante, siempre corrigiendo la gramática de todos.
•
The professor was known as a pedant for his strict adherence to obscure rules.
El profesor era conocido como un pedante por su estricta adhesión a reglas oscuras.