FWIW, this is what Wookieepedia has to say on the Neimoidian accent:
Wookieepedia said
Much as Imperial officers were given English accents, Silas Carson, who portrayed Nute Gunray in Star Wars: Episode I The Phantom Menace, was asked to imitate a Thai actor’s reading of his lines when looping Nute Gunray’s dialog for the movie.
Here’s the link:
http://starwars.wikia.com/wiki/Neimoidian/Legends#Behind_the_scenes