Que sera, sera

Tell me if this shouldn't be here, but I just found the song "Que sera, sera" / "Whatever will be, will be" and wanted to know what language the saying was from, assuming Italian or Spanish. It's quite funny, because apparently the answer is neither. I believe it's some sort of Spanglish and apparently used in Portuguese 😅

Source: Wikipedia https://en.m.wikipedia.org/wiki/Que_Sera,_Sera_(Whatever_Will_Be,_Will_Be)