Ouch... I was actually happy to see that someone had asked this question because I've always wondered what it meant, too. And I speak English pretty well. : )

I wonder, though, whether the remark about English would've come up had the OP's username been "Jim Smith."

Obviously within communities of experts there is no need to spell out exactly what is meant every time one throws about a phrase such as "Just create a simple frobnosticator..." But the great thing about PM is that it is home to practitioners of all levels, where experts interact with each other at the expert level while also generously sharing their expertise with beginners. And beginners know less than experts because we are beginners, not because we haven't mastered English. Someone could have an advanced degree in English literature and still need to ask what "a simple wrapper" means in this context.