Well, that's pretty blatant. I'm talking more about subtle clues like the extra 'u' in color for instance, or that extra 'i' in aluminum. Or saying "Standing on line" or "I watched a program in the telly last night." Or if a person says they fetched the spare tyre from the boot of the car, and then had to check under the bonnet, and then had a packet of crisps. Ok, now I'm getting too blatant.