The text of an Opera is called the libretto. If you're asking about the words or story of the opera itself, it's called a libretto. If you're asking about the translations now being offered at some operas during the performance, they're called "supertitles" or "surtitles."
Libretto.
Generally, a program. Booklets containing the text of the opera are called librettos (or libretti in Italian).
The text of an opera is called a "libretto". It often contains both the original text (often in Italian or German) and the translation, commonly in English.
Henrry Purcell
The libretto.
In opera, the text is written by a librettist.
The text of an opera is called the libretto and the writer is called a librettist.
Libretto.
Generally, a program. Booklets containing the text of the opera are called librettos (or libretti in Italian).
The text to an Opera.
Libretto is the text to an Opera.
The text of an opera is called a "libretto". It often contains both the original text (often in Italian or German) and the translation, commonly in English.
Essentially the script or dialogue scenario, called a script in drama and a libretto in opera.
Lebritto.
Henrry Purcell
The person who writes the text of an opera is known as a librettist. This individual is responsible for creating the storyline, dialogue, and lyrics that form the basis of the opera's text. The librettist's work is essential in shaping the overall narrative and emotional impact of the opera.
The libretto.