In the English language as in most languages we have developed symbols to denote the pronunciation of letters in words that are not pronounced with the same rules of grammar as in the given language. The purpose of this is to extenuate the sound of a letter that has been changed by the transition of the given word across countries or continents.
Examples of this are all around us in the United States and throughout the English language. In our case the elephant in the room is the word "Maté". In normal English grammar this word would mean the following.
Matte: mate 1 (mt)
n.
3.
a. Either of a pair of animals or birds that associate in order to propagate.
4.
Now to show the actual change in pronunciation of "e" at the end of "mate" in English you would place the acute "é" in the place of the normal "e" so you would have the word "maté". In this example you would get the following word and definition.
Maté: ma·té (mät, mä-t)
n.
Thus since in Latin America and throughout the Spanish speaking world they automatically pronounce the acute é or e the same way there is no need to speak of the difference. Matte and or Maté is pronounced the exact same way.
Further here is a list of acute and other common letters with various symbols in use:
Latin small letter A with acute: á
Latin small letter E with acute: é
Latin capital letter E with acute: É
More letters with acute, cercumflex, grave and diaeresis: á é í ó ú ý ê î ô û è ä ë ï ö ü Á É Í Ó Ú Ý Ê Î Ô Û È Ä Ë