The speaker in today’s “Thought for the Day” said that Doris Day had taught him how to pronounce Spanish correctly. Actually, it should have been Italian, although it is now widely said to be Spanish. It was cited by Christopher Marlow in his 1604 play Dr Faustus. The Italian phrase is “che sarà, sarà”, although even this is gramatically incorrect – see https://en.wiktionary.org/wiki/che_sara_sara.