You should write Lied with a capital L. By the way, Lied usually refers to the Germanic versions. If you are talking about British songs, for example songs by Britten, they are referred to as Art songs, not Lieder.
No I do not sing or accompany, but my ex was (is) one of the most famous exponents of Lieder and opera in Australia, so I have a very wide and eclectic knowledge thereof. Her performances of Brecht und Weil, the Wesendonk Lieder and Mahler's Die vier letzten Lieder were world class. The last of these rivalled Jessye Norman's stunning performances.