I just finished singing Beethoven’s Missa Solemnis in a concert as a member of the Grace Church Choral Society, and it was the most technically difficult piece I have ever sung in a choir. It was a single piece of concert length, a mass setting, as is custom for our spring concerts. It was all in one language: in this case, in Latin. This is different from our holiday concerts in the winter, where we sing a variety of Christmas-y and otherwise celebratory works in a variety of (European, Christian) languages, including English.