simple, straightforward
Let’s start with something simple.
Un poco simple, tal vez, pero su atractivo es innegable.
A little simple, perhaps, but its appeal is undeniable.
— La Princesa Prometida (1987)
Isn't the answer simple?
It's really simple.
Si prefiere el lenguaje simple, vaya a la universidad de Arte y Comercio.
If you prefer simple language, go to the University of Art and Commerce.
— 3 Idiotas (2009)
Este libro está escrito en inglés simple.
This book is written in simple English.
Lo que a ti te parece simple, a mí me parece complicado.
What seems simple to you, seems complicated to me.