The craft of crochet is fundamentally the same, but the stitch names are different in the UK and the US. The same stitches have different names. A single crochet (sc) in America is a double crochet (dc) in England. You have to be very aware of the origin of your pattern before you start.
And knitting comes in English and Continental style flavours. The same fundamental concept, just that you hold the yarn and needles differently.
Same same, but different