Dialect
A dialect was a variant of an existing language.

The Klingon language featured eighty poly-guttural dialects. In 2151, the universal translator of  could not lock onto Klaang's dialect. () By 2154, the UT of the Enterprise had been programmed with seven Klingon dialects. ()

The frequency distortions created by a symbiotic lifeform reminded Hoshi Sato of the phonetic patterns in some Andorian dialects. ()

The Xindi-Insectoid language had sixty-seven dialects. ()

The Romulan language had three dialects. As of 2258 of the alternate reality,  was able to speak all three dialects. Upon learning this,  asked her to relieve Lieutenant  at communications, as he was unable to tell Romulan from Vulcan. ()

In 2267, Captain Kirk told Spock that the baby language used towards Leonard James Akaar was an "obscure Earth dialect". ()

The Talaxian language had an "Old Tongue" dialect, used in the 15th century when the Talaxians referred to themselves as the Talax'ilzay. As a result of their encounters with the Vaadwaur, "vaadwaur" had come to mean foolish in Old Tongue. ()

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Linguistics