[mod-name]
water-pumpjack=Bomba extractora de agua
[mod-description]
water-pumpjack=Extrae agua de cualquier parte del suelo, eso sí, a una baja velocidad
[entity-name]
water-pumpjack=Bomba extractora de agua
[entity-description]
water-pumpjack=Extrae agua del suelo

Thank you!
PS.: I modified the description a little bit, to make it sound more natural in Spanish

Hi, thank you for the translation. Can you please confirm that the correct language code is "es-ES"?

Also, do you mind if I wait a moment before I release it? That would allow me to bundle some more changes (if necessary). Maybe I'm old-school, but I'd like to avoid creating a new release every couple days with just 1 small change.

Yes, it is "es-ES".

There is no hurry, you can update it whenever you consider it convenient.
Thanks!

implemented in 2.4.0