'Lingua muito bonita'.
to say language in portuguese, you would say 'lingua'
You can say "isso é bonito" in Portuguese to mean "that is beautiful."
beautiful
In Portuguese, you say "hi" as "oi" or "olá".
Lindo\linda.
you are stunning
In Portuguese, you say "delicioso" to mean delicious.
In Brazilian portuguese, girls and women say : "Olá lindão" (leendawn)
You could say "Você é linda" in Portuguese, which means "You are beautiful."
Escravo Português
you should say "translation into" another language.
You can say "Que bela imagem" in Portuguese to express that a picture is nice or beautiful.