You can say "isso é bonito" in Portuguese to mean "that is beautiful."
beautiful
In Portuguese, you would say "oi mãe" to address your mother.
you are stunning
Lindo\linda.
You could say "Você é linda" in Portuguese, which means "You are beautiful."
Boa noite, linda (for female beautiful)
'Ola', beleza!'
You can say "Que bela imagem" in Portuguese to express that a picture is nice or beautiful.
coisa linda
vida bela
Belo dançarino.