can speak
My uncle knows how to speak German.
He knows how to speak five languages.
El hombre que no sabe callar tampoco sabe hablar.
A man who cannot keep quiet also cannot speak.
Tom dice que sabe hablar un poco de francés.
Tom says he knows how to speak a little French.
Tom no sabe hablar francés, ¿verdad?
Tom doesn't know how to speak French, does he?
She knows how to speak Russian.
Mary sabe hablar japonés.
Mary knows how to speak Japanese.