Here's an interesting one:
This guy lays down the challenge: what does fake English sound like? You know when you used to say "Ching chang chong" in grade school, because you didn't know any better, and thought you were speaking Chinese? Well what do Chinese kids say when they think they're speaking English?
This guy speaks a bunch of gibberish that sounds surprisingly like Chinese and several European languages, and asks Youtubers to respond with the sounds of English, from people who can't speak English.
Some interesting responses:
One Japanese Kid (my favorite)
Another good one.
meanwhile, here is one Korean popstar's hybrid language, called "Hanglish" in the video title. Sounds to me like there's some latino L.A. style slang in there, too. (Warning: some of his non-language really sounds like some real English swears; note also that he's using one of those V-line face massagers during the video intro). Mr. Tyfoon.
Finally, this is what Korean sounds like to a couple of American kids. They're impersonating ajosshis (Korean old men), speaking English with Korean accents, but when they get excited, they swear in non-Korean gibberish. The Korean History Channel. (Language warning)