The question is unclear, though William Shakespeare spoke and was taught English, presumably his master did so too. He may have been proficient in other languages, to what extent and which languages is not known.
If you are asking about taking a Masters' degree from a University, Shakespeare never held any University degrees.
English.
Latin
William Shakespeare was an English poet and playwrighter.He could be regaured as the greatest wrighter in the English language and the worlds best dramatiser.
William Shakespeare wrote and spoke Modern English his entire life. It is not surprising that his epitaph was written in the same language, although the poetry is much worse than anything Shakespeare ever wrote.
William Shakespeare was born and spent his whole life in England where everyone spoke (and speaks) English. It would be very odd if he didn't know the English Language.
Yes. If you want to know why, find out more about William Shakespeare. In particular you might want to find out how much he has influenced the English language.
R. Moore. "William Shakespeare: Shakespeare's Globe Theater."eNotes:William Shakespeare. Ed. Penny Satoris. Seattle: Enotes.com Inc., October 2002. 15 April 2009. <http://www.enotes.com/william-masters/47514
Great language, deep and complex characterizations.
He had a profound impact on the English language.
sir William Shakespeare
The Taming of the Shrew was written in English by William Shakespeare.