What I like doing, is going on PowerDVD, and slowing the speed down so they tttaaaaaaaallllllkkkkkk lllllllliiiiiiiiiikkkkkkkkkkkkeeeeee ttttttttthhhiiiiiiissssss like they're high or something. Pretty funny. And then speed it past regular so they sound really hyper.
I've never tried that; but I'm really weird so I think I'll give it a go...
as to the spanish thing, I tried that too. And it's not that their voices suck; it's just that it's only funny if you understand what the heck they're saying.
Oh, and I watched Squilliam Returns in Spanish once, and Guimardo (Spanish for Squilliam) nearly gave me a dang heart attack.