German superstore Aldi has been caught out selling Spanish laptops to British shoppers.

Customers who purchased Medion laptops from Aldi were alerted to the problem when they noticed that the keyboards had no pound signs — instead there was only a € symbol. Another clue was that Windows had been set with Spanish as the default language — something that is easy to change, but would be off-putting for a first-time user.

But Medion today assured customers their laptops would be replaced and said that the mix-up was unintentional.

"All buyers of laptops should have received English versions," said Peter Webb, spokesman for Aldi UK. "Because Medion is a pan-European company, we produce many different language versions of the products we supply and it would appear in this case that some foreign units have crept into the UK batch."

Aldi was not available for comment and its customer helplines are pretty non-existent, with all store numbers held ex-directory.

Webb said all customers affected by the bungle should call Medion UK directly on 0870 720 0370.