I'm French and her accent is so cute I sing this part with an accent. besides Sheibe is not German, I made a German friend listen to it and looked so dumb when he told be it doesn't mean anything!
that german was made up! notice she says "I don't speak german but I can if you like" that means she can do so, in her own way. It may be meaningless unless we incorporate our own definition in those lyrics LOL