Opera arias, art songs and other lyrical works are written in the original language of the composer.
For example, Bizet's opera 'Pearl Fishers' will appear in the catalogue as 'Les Pecheurs de perles'. If you are unsure of the original language of the title, you can refer to Oxford Music Online (Grove online) to find the exact title.
Search Databases for Oxford Music Online (Grove online)
From the Oxford Music Online Database keyword search the composer's surname and words from the opera title. (Bizet Pearl Fishers)
Once you have located the title in its original language, search the title using a keyword search in the Library catalogue