What's strange to me is that, as far as I know, "plátano" is only commonly used in Spain, but the accent of the AI voice didn't sound like it's from Spain. It sounds more like an American who speaks Spanish as a second language, and those folks typically speak some Mexican dialect of Spanish.
The wiktionary page for "plátano" has a map illustrating how various Spanish-speaking countries refer to the banana.
https://en.wiktionary.org/wiki/pl%C3%A1tano#/media/File:Porp...
My principal association with plátano is plaintain, personally, but I am not a Spanish speaker.
Plátano is commonly used for banana in Mexico, just bought some at a Soriana this weekend.
