There are many factors affecting on speaking.Learning a language is kind of a psychological matters on which social,cultural and environmental, etc have of course their effects. No matter how many words you have in your mind no matter how many grammatical rules you know, when you are going to speak stress and the pressure of public speaking.
"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.
I will speak in english better
yes they did speak English
"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
he can speak spanish and english
But I do speak English, you are obviously misinformed.
They did not speak English they spoke Greek.
Ryeowook can speak english a little.
No he can't speak english. He knows English only