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

Examples
Antes de empezar, el artista tenía imágenes muy claras de lo que quería pintar.
Before starting, the artist had very clear mental images of what he wanted to paint.
Las imágenes de su infancia le volvieron a la mente de repente.
The images (memories) of his childhood suddenly came back to his mind.
La película transmite imágenes de desesperación y esperanza a la vez.
The movie transmits images (feelings/representations) of desperation and hope at the same time.
Singular vs. Plural
When talking about a person's public standing or reputation, you almost always use the singular 'imagen' (e.g., 'su imagen pública' - his public image).
Related Translations
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