In the third season, the Nelvaanians spoke in Hungarian (with heavy accent). Anakin's Nelvaanian name "Holt Kezed" means "Your Dead Hand" in Hungarian.
Genndy Tartakovsky asked his mother-in-law to translate dialog for the Nelvanian natives into Hungarian.
The Wookiee scout is named Tarkov after Clone Wars director Genndy Tartakovsky. His young cub is Jaccoba, named for Tartakovsky's son Jacob.
The planet Nelvaan is named after the Canadian animation studio Nelvana which produced the cartoon segment for The Star Wars Holiday Special (1978) and the short lived Star Wars: Ewoks (1985) and Star Wars: Droids (1985) series. The 'dogfaced' Nelvaanians are a nod to the characters from Nelvana's Rock & Rule (1983).
Anakin Skywalker's 'Revenge of the Sith' style haircut was partly inspired by Mark/Ken from Gatchaman (1972) and Omar from Rock & Rule (1983)