Is a "plátano" a banana?
In my experience, a "plátano" is different than a "banana" (México) or "banano" (Guatemala). Bananas are usually sweet right off the tree, but plantains are only sweet when they are very mature.
The English language borrowed this word from... Spanish! (which, in turn, borrowed from an African language). The word plátano was borrowed from Greek.
I have spanish speaking friends and they said the word they use for banana is el guineo. El platano is a plaintain and they dont use any form of the word banana.