An online entrepreneur says that poor spelling is costing the UK millions of pounds in lost revenue for internet businesses.
Charles Duncombe says an analysis of website figures shows a single spelling mistake can cut online sales in half.
Mr Duncombe says when recruiting staff he has been "shocked at the poor quality of written English".
Sales figures suggest misspellings put off consumers who could have concerns about a website's credibility, he says.
The concerns were echoed by the Confederation of British Industry (CBI), whose head of education and skills warned that too many employers were having to invest in remedial literacy lessons for their staff.
Mr Duncombe, who runs travel, mobile phones and clothing websites, says that poor spelling is a serious problem for the online economy.
"Often these cutting-edge companies depend upon old-fashioned skills," says Mr Duncombe.
And he says that the struggle to recruit enough staff who can spell means that this sector of the economy is not as efficient as it might be.
Figures from the Office for National Statistics published last month showed internet sales in the UK running at £527m per week.