You might be interested to know that the accent on maté is a hyperforeignism. In Spanish, the drink is just yerba mate. The (nonexistent) word maté would be pronounced "mah-TEH", whereas mate is pronounced "MAH-teh"; presumably the erroneous diacritic was added to keep people from rhyming it with fate.

I just realized that maté does exist in Spanish: it means "I killed"—all the more reason to use mate instead. :-)