For the record, Nemoidians do sound quite a bit like Titra/Bellucci dubs of Asian movies:
https://www.youtube.com/watch?v=KvWPLsHS8h8
https://www.youtube.com/watch?v=DeuL1C3peRc
https://www.youtube.com/watch?v=5hGktFN9AzA
https://www.youtube.com/watch?v=LeqUkNC89GI
So, while I don’t think Lucas consciously wanted to mock Asians with the Nemoidians, there’s a pretty good chance he was if since he was influenced by Kurosawa’s films (among others), then he was also in intimate contact with the dubbed versions of said films.