¿Por qué eres tan maravilloso?
Translated from English to Spanish its 'el es tan lindo. This is how you say he is, so cute in Spanish.
You could say "Él es tan guapo".
lindo
aww emily es tan linda
You can say "tus hijas son tan guapas"
Eso es precioso.
linda foto
You can say "Él es muy mono."
For a girl, Bonita. For a guy Bonito, but that would make it awkward so you would say Guapo. ex. He is cute, El esta guapo. ex. She is cute, Ella es Bonita.
Un Cachorro mono (:
ella es linda
Roughly - soy lindo