I would argue that prescriptivism in English still refers solely to English. The idea that since data is plural in Latin, it must also be plural in English does

I would argue that prescriptivism in English still refers solely to English. The idea that since data is plural in Latin, it must also be plural in English doesn't follow for me. Plenty of words change plurality when being taken into another language, e.g. * Laos is plural in French but singular in English. * Cherise is singular in French, but was rebracketed as a plural in English (and then transformed to cherry as the singular).