Star Trek is well known for inventing an extensive spoken and written Klingon language, but Star Trek has also constructed a Vulcan language that has been used throughout the Star Trek franchise, raising questions about when it was first spoken. Just as Klingon matching the rough personality of its people, the Vulcan language reflects the serenity of Star Trek's Vulcan characters. Vulcan script takes multiple forms, with the most popular being designer Mike Okuda's calligraphic swirls, short lines, and dots that wind around a central vertical or horizontal line. Another form dispenses with the central line and features only glyphs.
The Vulcan language actually appeared before the first time Klingon was spoken in Star Trek, but it is still the less-developed language of the two. As the franchise's leading Vulcan, Spock (Leonard Nimoy) is responsible for most of our exposure to Vulcan culture, but Spock is particularly secretive in Star Trek: The Original Series. Other Vulcans, like Star Trek: Enterprise's Subcommander T'Pol (Jolene Blalock) and Star Trek: Voyager's Lieutenant Tuvok (Tim Russ), are equally private. More of the Vulcan language appears in modern Star Trek shows Star Trek: Discovery and Star Trek: Strange New Worlds, featuring Ethan Peck's Spock.
The Vulcan Language Is Spoken For The First Time In Star Trek: The Original Series Season 2
Star Trek Returns To The Vulcan Home World In Star Trek: Enterprise and Star Trek: Discovery
The first time the Vulcan language is spoken is in the Star Trek: The Original Series season 2 episode "Amok Time". During a trip back to Vulcan to reunite with Spock's secret wife, T'Pring (Arlene Martel), several Vulcan words are introduced, from Spock's pon farr to the kal-if-fee challenge that T'Pring initiates. Most of the Vulcan language in TOS and the Star Trek movies comes from Vulcan rituals. Star Trek: The Motion Picture features Spock's interrupted kolinahr ritual to purge all emotion, performed entirely in the Vulcan language, to match the use of Klingon earlier in the movie.
Star Trek's subsequent instances of spoken Vulcan are based on the sounds of the Vulcan language that were first heard in "Amok Time". Lieutenant Tuvok refers to Koon-ut-so'lik, meaning marriage proposal, in Star Trek: Voyager season 3, episode 16, "Blood Fever", which is based on T'Pring's Koon-ut-kal-if-fee, or marriage challenge. Tuvok also uses Vulcan words for concepts without easy translations, like Plak tow, referring to the episode's eponymous blood fever. In Star Trek: Enterprise, Vulcans are the closest alien allies to early Starfleet, so Enterprise's Subcommander T'Pol contributes significant additions to our understanding of Vulcan language and culture.