Literal translations would be "Dulce Nina" and "Amada Nina", both are fine. You could also use "Amorosa Nina" and "Cariñosa Nina", though both have a small nuance, they are qualities of the cat itself.
I wanna be quick with this, I've made a painting for my Argentinian teacher. it’s of his cat, Nina.
he speaks spanish
I want to write ‘beloved Nina‘ or something similar on the back for him in Spanish, and I don’t trust Google Translate.
what would ’sweet Nina’ or ‘beloved Nina‘ be in Spanish?
Literal translations would be "Dulce Nina" and "Amada Nina", both are fine. You could also use "Amorosa Nina" and "Cariñosa Nina", though both have a small nuance, they are qualities of the cat itself.
Beloved Nina, would sound best as “Querida Nina” or “Nina querida”