Italian is the most common language used for opera. This is because opera originated in Italy in the 16th century, and Italian composers have continued to write operas into the modern day. Some of the most famous Italian operas include "La Bohème," "Tosca," and "Turandot."
French
French is another common language for opera. This is because opera was very popular in France in the 17th and 18th centuries, and many famous French composers wrote operas during this time. Some of the most famous French operas include "Carmen," "Faust," and "Samson et Dalila."
German
German is also a common language for opera. This is because opera was very popular in Germany in the 19th century, and many famous German composers wrote operas during this time. Some of the most famous German operas include "Der Ring des Nibelungen," "Tristan und Isolde," and "Parsifal."
English
English is a relatively new language for opera. However, there have been a number of famous English operas written in the 20th and 21st centuries. Some of the most famous English operas include "Peter Grimes," "The Rake's Progress," and "Nixon in China."
Other languages
Opera has also been written in a number of other languages, including Spanish, Russian, Czech, and Hungarian. Some of the most famous operas in these languages include "The Queen of Spades," "Rusalka," and "Lohengrin."