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

Examples
Ella tiene una mentalidad muy positiva ante los problemas.
She has a very positive mindset when facing problems.
Para ser un gran deportista, hace falta una mentalidad de hierro.
To be a great athlete, you need a mindset of iron (a very strong mindset).
Es difícil cambiar la mentalidad de toda una sociedad.
It is difficult to change the mentality of an entire society.
The '-dad' Gender Rule
Almost all Spanish words that end in '-dad' are feminine. This means you should always use 'la' or 'una' with mentalidad.
Mind vs. Mindset
While 'mente' refers to the physical or spiritual 'mind' itself, 'mentalidad' refers to the specific way someone thinks or their attitude.
Gender Agreement
Mistake: “Él tiene un mentalidad abierta.”
Correction: Él tiene una mentalidad abierta.
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