There is a growing trend for people to substitute ‘C’ with ‘K’. Wayne Rooney’s new boy is called Klay rather than Clay.
"Most English words which begin with K are borrowed from German or Japanese, like karate or karaoke. So by using K or Z, it could be that we are suggesting something exotic in some way," Ian Brookes from the Collins Dictionary.
But linguistics expert Prof Vivian Cook thinks it is quite the contrary.
"In the UK it has been used by businesses mostly at the cheap end of the market."