LibreOffice Calc has an option to force English function names regardless of the current localization. I guess Excel should have something similar, too¹.

Fun fact: in European and Brazilian Portuguese, the same function names can refer to different things. European SUBSTITUIR² is REPLACE (Brazilian MUDAR), Brazilian SUBSTITUIR³ is SUBSTITUTE (European SUBST).

¹ I've found this solution https://superuser.com/questions/1908516/how-to-change-the-la... but I haven't tested it since I don't have MS Excel at hand to check

² https://support.microsoft.com/pt-pt/office/fun%C3%A7%C3%A3o-...

³ https://support.microsoft.com/pt-br/office/substituir-fun%C3...