Wa molay rah? warengi muchu puku sculpa!

All the aliens couldn't have been added later, it wouldn't be Star Wars without some, but I can totally see them spackling the gaps in with extra Huttese.

And on a unrelated note, there's been a recent reluctance on the part of Lucasfilm to have characters speak alien languages, and I think the universe is poorer for it. That would have gone for Kotor too.