[MMM]

I get the impression that Bobby is a character, something that many of the talents that appear on variety shows do. He is more intelligent than he lets on because he acts like his Japanese isn't so good, but the mistakes he makes are not mistakes poor speakers would make, but are actually funny.

This is common among Japanese natives, too. "Characters" from HG and IKKO to Kanno sisters are not completely honest, but are entertaining. (Kanno sisters...not actually sisters).