I was preparing a recipe today that called for celery root; I work in England and assumed this meant the base of a celery stalk...wrong! I googled to make sure and found out it meant celeriac! WOW, I worked in the US for many years and assumed I knew the translations (cilantro is coriander, zucchini is courgette, egg plant is aubergine etc....). What cool things have you only just learned after many years of cooking???