Italian language
The Italian language was a language spoken on the planet Earth, predominantly spoken by Italians and in Italy.

A 17th century map from Earth labeled several locations in Italian, including the Indian Ocean (Mar di India) and the Bay of Bengal (Golfo de Bengala). (, opening credits)

During a malfunction of the universal translator aboard  caused by the Sphere lifeform, Commander Nhan's speech was translated into Italian: "Il traduttore universale no funziona." ()

Spock asked Sybok "Qual sei tu?", translating as "Who art thou?" from Italian, when he initially didn't recognize his half-brother on Nimbus III in 2287. Sybok himself later used this phrase upon encountering   on . ()

 in the holodeck program created by Kathryn Janeway, as well as various others, occasionally spoke Italian:

Background information 
The Star Trek: Voyager episode title  is Italian, meaning virtuous or master. 

The phrase used by Spock and Sybok is a quote from Dante's Divine Comedy.

The script for "The Siege of AR-558" misspelled "capisce" as "capice".

External links 
 
 
Earth languages