"He does not", or, "he doesn't speak English" would be correct. It would never be 'he do not speak English,' as that is incorrect grammar.
yes, some of them speak english.
yes they did speak English
I will speak in english better
"I can't speak English!" in English is Non parlo l'inglese! ("I don't speak English!") in Italian.
Yes he can speak English but he prefers to speak spanish
Yes the Celts do speak English
They did not speak English they spoke Greek.
But I do speak English, you are obviously misinformed.
Ryeowook can speak english a little.
he can speak spanish and english
No he can't speak english. He knows English only