The UK Keyword spelling difference is no longer a problem for seekers in the UK, as they have preferred US spellings like donut and yogurt.
It can be seen on Google Insights where blue lines represent ‘UK’ words while red indicates Americans (also known as US). In 2000 the graphs of US and UK spellings began to change. These changes resulted in the rapid change of language as the people began to prefer the US Spellings such as the spellings of donut instead of doughnut and fetus instead of foetus.
Moreover, a preference for the US language was established as ‘UK’ wasn’t used anymore. Of course, there’s no need to be worried, as this is just a spelling difference, and it doesn’t affect the content of your article!
As you can see, people aren’t bothered about what spelling they’re searching for. They are more concerned about finding the information as fast as possible.