PS2 control pads

Why is "analogue" spelt "analog" on the UK ones? I'm going to scratch the "ue" on as a sign of defiance at the gradual Americanisation (note spelling with an 's' rather than a 'z'. Also, it's pronounced fucking ZED) of our language. Okay, that was a lie. I'm not scratching up my lovely PS2 control pad. But Americans really need to learn to use superfluous 'u's, 'e's and repetitions of letters.