Not the language, but the cuisine. Sure, we could be cynical and say that the classes are basically infomercials to promote Bosch kitchen appliances. But who cares? The seminars are free (periodically there's a small fee, like $5), and the information is valuable.
Their lesson plans span the globe. There might be an evening in Vienna, with Wiener schnitzel, spaetzle with pepper and crisp shallots, braised cabbage with bacon, and apricot crepes. It might be a menu of 10-minute meals featuring (surprise) name-brand pressure cookers. It might be American, Southwestern, Mexican or vegetarian. There's a lot of bread baking, with (who'd have guessed) Bosch bread-making machines. But it's free! Consider it a Tupperware party with a 'tude.