> "In English, "mate" is occasionally written "maté", to distinguish it from other meanings of the word mate, although this spelling is not used in Spanish or Portuguese."
https://en.wikipedia.org/wiki/Yerba_mate
A similar example is "résumé", so as to not be confused with "resume".
Going further down the Wikipedia hole, here's a page describing use of diacritics in English, which includes a subsection on "Accent-addition and accent-removal":
https://en.wikipedia.org/wiki/English_terms_with_diacritical...