Background Pony #042E
Why would ponies speak English? Do you have any notion of how complex the etymology of practically every single modern word is? Why would that be replicated–word for word, morpheme for morpheme, grammatical structure for grammatical structure–in a different culture?
Moreover, written text in the show is explicitly not in English except for those rare cases the audience needs to be able to read it (“we couldn’t fit it all in”)
Moreover, written text in the show is explicitly not in English except for those rare cases the audience needs to be able to read it (“we couldn’t fit it all in”)