There is no English word "trustfull". "Trustful" means "Inclined to believe or confide readily; full of trust", according to the linked answer. Shakespeare does not use this word, but some of his contemporaries do, but with the meaning "trusty" or "reliable".
With a somewhat negative connotation, the word "credulous" seems to best fit the bill here. Its meaning to Shakespeare is the same as it is today. Shakespeare uses it a number of times, e.g. Tranio in Taming of the Shrew, "If he be credulous and trust my tale, I'll make him glad to seem Vincentio", or Iago in Othello "Thus credulous fools are caught; And many worthy and chaste dames even thus, All guiltless, meet reproach."
Elizabethan English word for taste is the same as modern English. It hasn't changed.
whilst
"These" in Elizabethan English is exactly the same as it is in all other forms of Modern English: "these" e.g. "Where are these lads? Where are these hearts?" (Midsummer Night's Dream)
Ears. As in "Friends, Romans, Countrymen, lend me your ears." Elizabethan English is modern English--most words are the same now as they were then.
Orlando Trustfull was born on 1970-08-04.
In Elizabethan English, if someone were inclined to say "happy birthday", it would probably be said "happy birthday". People didn't celebrate birthdays much in those days, so there are no examples that leap to mind.
Elizabethan English is Modern English, just an early form of it.
Elizabethans like Shakespeare did not have a concept of homework (with 14-hour schooldays they didn't need it) and so there was no word for it.
Elizabethan English is still English, and "idiot" in English is "idiot". It is ridiculous to think that Shakespeare wrote in a foreign language. Examples of "idiot" in Shakespeare include "Tis a tale told by an idiot" (Macbeth) and "the portrait of a blinking idiot" (Merchant of Venice)
"Good morn" = Good morning "Good den" = Good day (Hello/Hi) Hello was an interjection of surprise. For example "Hello! Your hair is on fire!" Or "Oh, hello! You startled me!"
"Class" can mean a number of different things. How you would say it depends on which meaning you wish to use. The word "class" itself does not appear to have been used for any purpose in Elizabethan writings.
Shakespeare's language was English and "have" in English is "have". "I have of late, but wherefore I know not . . ." (Hamlet) "I have another daughter" (King Lear) "We have heard the chimes at midnight" (2 Henry IV)