The History of English Podcast: Episode 101: The Birth of English Song http://historyofenglishpodcast.com/2017/10/11/episode-101-the-birth-of-english-song/ The best points here for EFL teachers are the Middle English grammar constructions with ‘what’ that mirror Spanish speakers’ errors with What/How. ”What do you say __x__?’ is unlike modern Spanish and Modern English; however it would be correct M.E.!
The History of English Podcast: Episode 100: Decoding English This episode has great background on /ts/ /j/ /y/. Great for Latina and Greek cognates is Spanish and English. http://historyofenglishpodcast.com/2017/09/25/episode-100-decoding-english/