How to Say "confirms" in Spanish
The most common Spanish word for “confirms” is “confirma” — use 'confirma' when someone or something officially validates or agrees to a previously made plan, reservation, or piece of information..
confirma
/kohn-FEER-mah//konˈfiɾma/

Examples
El hotel confirma nuestra reserva para esta noche.
The hotel confirms our reservation for tonight.
Ella confirma que el examen es el lunes.
She confirms that the exam is on Monday.
One word, two roles
This word works as a statement ('He confirms') or a friendly command ('Confirm the plan!').
The missing 's' in English
Mistake: “Using 'He confirm' instead of 'He confirms'.”
Correction: In Spanish, 'confirma' covers the 's' ending we use in English for he, she, or it.
afirma
/ah-FEER-mah//aˈfiɾma/

Examples
El científico afirma que el clima está cambiando.
The scientist states that the climate is changing.
Ella afirma tener la respuesta correcta.
She claims to have the correct answer.
¡Afirma bien esa escalera!
Make that ladder steady!
Two Roles for One Word
'Afirma' can be used for stating a fact (He states) OR as a command to tell someone to make something steady (Steady it!).
Afirmar vs. Decir
Mistake: “Using 'afirma' for every single thing someone says.”
Correction: Use 'afirma' when someone is making a strong point or stating a fact; use 'dice' for general speaking.
Confirming vs. Stating
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