I can speak
I can speak Dutch.
I know how to speak Chinese.
O Francês é o único idioma que eu sei falar.
French is the only language I know how to speak.
I know how to speak English.
I can speak two languages.
I can speak a little.
I know how to speak Greek, a little.
I can speak Spanish.
Eu sei falar Chinês, mas não sei escrever.
I can speak Chinese, but I don't know how to write it.