Translation of the words of a foreign opera (or choral work) projected on a screen above the stage WordNet 3.0 & Open English WordNet

Surtitles, also known as supertitles, SurCaps, OpTrans, are translated or transcribed lyrics/dialogue projected above a stage or displayed on a screen, commonly used in opera, theatre or other musical performances. Wikipedia

Dialogue presented above a stage or screen Wikidata

A surtitle. Wiktionary

A translation of a segment of the libretto or other text or sometimes a brief summary of the plot projected onto a screen above the stage during a performance of an opera or other similar performance sung in a foreign language; a supertitle. Wiktionary

Translation. Wiktionary (translation)