Hello, McGrath of Harlow. Why sing it in English? Because to me music is about communciation and, while I'm communicating something in a language very few or no one (depending on the audience) understands, I'm not communicating anything in terms of verbal meaning (even if the music gives emotional meaning). That's why, when I sing in Middle English, if the song is short (say, Miri it is), I'll sing it in ME and modern English. And yes, sometimes I don't and give a translation first. It works with some songs, not with others.