They can speak Spanish.
As a matter of fact, I do speak Spanish.
I can speak a little bit of English and Spanish.
I understand only a little Spanish.
I wish I could have spoken Spanish.
To say nothing of Spanish.
They can speak a little bit of Vietnamese.
From now on, I'm going to speak in Spanish.
He and I can not speak Spanish.
It is worth while learning Spanish.
It is worthwhile learning Spanish.
I can understand a little bit of English and Spanish.